Remove Edge user associations

Overview

About this script

This script improves your privacy on Windows.

These changes use Windows system commands to update your settings.

This script removes user-chosen Microsoft Edge associations for specific file types and web links. Even if a user does not explicitly choose Edge as the default browser, it is chosen by default.

Edge associations often remain after uninstalling the browser 1. This can affect privacy and system performance.

Removing these associations will:

• Enhance privacy by reducing Microsoft Edge's presence in your system
• Improve system stability, especially if Edge is uninstalled 1
• Boost performance by eliminating unnecessary file associations
• Improve user control by allowing you to choose the browser you wish to use.

Removing these associations allows you to choose which applications open. This enhances user control, privacy, system stability, and performance.

Caution

Removing these associations will prompt you to choose a default application the next time you open files or URL protocols previously associated with Edge. Remember to set up an alternative browser.

Technical Details

The script affects various file types (such as .htm, .html) and web protocols (e.g., http, https, ftp). It deletes Edge associations from the Windows Registry that control the user-chosen associations.

This action applies to Windows 10 versions from 1909 onward and all versions of Windows 11. Earlier Windows 10 versions (like 1903) do not have these specific Edge associations by default.

The table below shows the availability of Edge associations across different Windows versions, confirmed by tests:

Association	ProgId	Type	Win 10 1903	Win 10 1909	Win 10 20H2	Win 10 21H2	Win 10 22H2	Win 11 21H2	Win 11 22H2	Win 11 23H2	Registry Path
http	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice
https	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice
microsoft-edge	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge\UserChoice
microsoft-edge-holographic	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge-holographic\UserChoice
ms-xbl-3d8b930f	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\ms-xbl-3d8b930f\UserChoice
read	MSEdgeHTM	URL	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\read\UserChoice
.htm	MSEdgeHTM	File	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice
.html	MSEdgeHTM	File	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice
.pdf	MSEdgePDF	File	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice
.svg	MSEdgeHTM	File	❌	❌	✅	✅	✅	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice
.mht	MSEdgeHTM	File	❌	❌	❌	✅	✅	❌	❌	❌	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice
.mht	MSEdgeMHT	File	❌	❌	❌	❌	❌	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice
.mhtml	MSEdgeHTM	File	❌	❌	❌	✅	✅	❌	❌	❌	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice
.mhtml	MSEdgeMHT	File	❌	❌	❌	❌	❌	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice
.xml	MSEdgeHTM	File	❌	❌	❌	❌	✅	❌	❌	❌	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice
ftp	MSEdgeHTM	URL	❌	❌	❌	❌	❌	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice
.xht	MSEdgeHTM	File	❌	❌	❌	❌	❌	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice
.xhtml	MSEdgeHTM	File	❌	❌	❌	❌	❌	✅	✅	✅	HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice

To verify these associations on your system, run this PowerShell command:

$baseRegistryPaths = @(
    'HKCU:\SOFTWARE\Microsoft\Windows\Shell\Associations\UrlAssociations',
    'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts'
)
$results = @()
foreach ($baseKey in $baseRegistryPaths) {
    $subKeys = Get-ChildItem -Path $baseKey -ErrorAction SilentlyContinue
    foreach ($subKey in $subKeys) {
        $userChoicePath = Join-Path $subKey.PSPath 'UserChoice'
        if (-Not (Test-Path $userChoicePath)) {
            continue
        }
        $progId = (Get-ItemProperty -Path $userChoicePath -Name ProgId -ErrorAction SilentlyContinue).ProgId
        if ($progId -and ($progId -like "MSEdge*")) {
            $formattedRegistryPath = $userChoicePath -replace '^Microsoft\.PowerShell\.Core\\Registry::', ''
            $results += [PSCustomObject]@{
                ProgID = $progId
                Association = $subKey.PSChildName
                RegistryPath = $formattedRegistryPath
            }
        }
    }
}
$results | Format-Table -AutoSize

This script uses Batch (batchfile) scripting language.

Not Advised

This script should only be used by advanced users. This script is not recommended for daily use as it breaks important functionality. Do not run it without having backups and system snapshots.

Implementation Details

• Language: batch

• Required Privileges: Administrator rights

• Compatibility: Windows only

• Reversibility: Can be undone using provided revert script

Explore Categories

Remove Edge associations

This action belongs to Remove Edge associations category. This category removes Microsoft Edge browser associations from your Windows system, enhancing privacy and system control. These associations often remain after uninstalling Edge, potentially leading to unexpected behaviors and privacy concerns. Removing these associations will: Preventi Edge... Read more on category page ▶

Remove Edge

This action belongs to Remove Edge category. This category automates the uninstallation of Microsoft Edge (also known as "Chromium Edge" or "New Edge"), the web browser that comes pre-installed with many versions of Windows. Microsoft Edge collects various types of data, some of which pertain to your browsing habits, such as the websites... Read more on category page ▶

Remove bloatware

This action belongs to Remove bloatware category. This category configures Windows using 215 scripts. These scripts are organized in 35 categories. The category includes 1 subscripts and 9 subcategories that include more scripts and categories. Read more on category page ▶

Apply now

Choose one of three ways to apply:

1. Automatically via privacy.sexy: The easiest and safest option.
2. Manually by downloading: Requires downloading a file.
3. Manually by copying: Advanced flexibility.

Alternative 1. Apply with Privacy.sexy

privacy.sexy is free and open-source application that lets securely apply this action easily.

Open privacy.sexy

You can fully restore this action (revert back to the original behavior) using the application.

privacy.sexy instructions

1. Open or download the desktop application
2. Search for the script name: Remove Edge user associations.
3. Check the script by clicking on the checkbox.
4. Click on Run button at the bottom of the page.

Alternative 2. Download

Irreversible Changes

This script is irreversible, meaning there is no straightforward method to restore changes once applied. Exercise caution before running, restoring it may not be possible.

1. Download the script file by clicking on the button below:

   Download script

2. Run the script file by clicking on it.

Download revert script

This file restores your system to its original state, before this script is applied.

Download restore script

Alternative 3. Copy

This is for advanced users. Consider automatically applying or downloading the script for simpler way.

1. Open Command Prompt as administrator.

HELP: Step-by-step guide

1. Click on Start menu

   Windows 11

   

   Windows 10

   

2. Type cmd

   Windows 11

   

   Windows 10

   

3. Right click on Command Prompt select Run as administrator

   Windows 11

   

   Windows 10

   

4. Click on Yes to run Command Prompt

   Windows 11

   

   Windows 10

   

---

Windows 11

Windows 10

2. Copy the following code:

Code to apply changes

:: Remove user-chosen URL association for "MSEdgeHTM" for http URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen URL association for "MSEdgeHTM" for https URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\https\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen URL association for "MSEdgeHTM" for microsoft-edge URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen URL association for "MSEdgeHTM" for microsoft-edge-holographic URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge-holographic\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\microsoft-edge-holographic\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen URL association for "MSEdgeHTM" for ms-xbl-3d8b930f URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ms-xbl-3d8b930f\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ms-xbl-3d8b930f\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen URL association for "MSEdgeHTM" for read URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\read\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\read\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen file association for "MSEdgeHTM" for .htm files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .html files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgePDF" for .pdf files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgePDF'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .svg files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .mht files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-21H2.This operation will not run on Windows versions later than Windows10-MostRecent.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-MostRecent'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeMHT" for .mht files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeMHT'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .mhtml files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-21H2.This operation will not run on Windows versions later than Windows10-MostRecent.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-MostRecent'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeMHT" for .mhtml files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeMHT'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .xml files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-22H2.This operation will not run on Windows versions later than Windows10-22H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-22H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-22H2'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen URL association for "MSEdgeHTM" for ftp URL protocol
:: Delete the registry value "ProgId" from the key "HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice" 
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $keyName = 'HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\ftp\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; }"
:: Remove user-chosen file association for "MSEdgeHTM" for .xht files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Remove user-chosen file association for "MSEdgeHTM" for .xhtml files
:: Delete the registry value "ProgId" from the key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice" (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $keyName = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice'; $valueName = 'ProgId'; $hive = $keyName.Split('\')[0]; $path = "^""$($hive):$($keyName.Substring($hive.Length))"^""; Write-Host "^""Removing the registry value '$valueName' from '$path'."^""; if (-Not (Test-Path -LiteralPath $path)) { Write-Host 'Skipping, no action needed, registry key does not exist.'; Exit 0; }; $existingValueNames = (Get-ItemProperty -LiteralPath $path).PSObject.Properties.Name; if (-Not ($existingValueNames -Contains $valueName)) { Write-Host 'Skipping, no action needed, registry value does not exist.'; Exit 0; }; $expectedData = 'MSEdgeHTM'; $currentData = Get-ItemProperty -LiteralPath $path -Name $valueName | Select-Object -ExpandProperty $valueName; if ($currentData -ne $expectedData) { Write-Host "^""Skipping, no action needed, current data '$currentData' is not same as '$expectedData'."^""; Exit 0; }; Grant-Permissions; try { if ($valueName -ieq '(default)') { Write-Host 'Removing the default value.'; $(Get-Item -LiteralPath $path).OpenSubKey('', $true).DeleteValue(''); } else { Remove-ItemProperty -LiteralPath $path -Name $valueName -Force -ErrorAction Stop; }; Write-Host 'Successfully removed the registry value.'; } catch { Write-Error "^""Failed to remove the registry value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"

3. Right click on command prompt to paste it.
4. Press Enter to apply remaining code.

Copy restore code

Copy and run the following code to restore changes:

Revert code

:: Restore user-chosen file association for "MSEdgeHTM" for .htm files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.htm\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .html files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.html\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgePDF" for .pdf files
:: Restore user-chosen file association for "MSEdgeHTM" for .svg files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-20H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-20H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.svg\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .mht files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-21H2.This operation will not run on Windows versions later than Windows10-MostRecent.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-MostRecent'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeMHT" for .mht files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeMHT'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mht\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .mhtml files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-21H2.This operation will not run on Windows versions later than Windows10-MostRecent.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-MostRecent'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeMHT" for .mhtml files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeMHT'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mhtml\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .xml files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows10-22H2.This operation will not run on Windows versions later than Windows10-22H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows10-22H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }$versionName = 'Windows10-22H2'; $buildNumber = switch ($versionName) { 'Windows11-21H2' { '10.0.22000' }; 'Windows10-MostRecent' { '10.0.19045' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1903' { '10.0.18362' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for maximum Windows '$versionName'"^""; }; }; $maxVersion=[System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -gt $maxVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is above maximum $maxVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xml\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .xht files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xht\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"
:: Restore user-chosen file association for "MSEdgeHTM" for .xhtml files
:: Restore the registry value "ProgId" in key "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice" to its original value (with additional permissions)
:: This operation will not run on Windows versions earlier than Windows11-21H2.
PowerShell -ExecutionPolicy Unrestricted -Command "$versionName = 'Windows11-21H2'; $buildNumber = switch ($versionName) { 'Windows11-FirstRelease' { '10.0.22000' }; 'Windows11-22H2' { '10.0.22621' }; 'Windows11-21H2' { '10.0.22000' }; 'Windows10-22H2' { '10.0.19045' }; 'Windows10-21H2' { '10.0.19044' }; 'Windows10-20H2' { '10.0.19042' }; 'Windows10-1909' { '10.0.18363' }; 'Windows10-1607' { '10.0.14393' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: No build for minimum Windows '$versionName'"^""; }; }; $minVersion = [System.Version]::Parse($buildNumber); $ver = [Environment]::OSVersion.Version; $verNoPatch = [System.Version]::new($ver.Major, $ver.Minor, $ver.Build); if ($verNoPatch -lt $minVersion) { Write-Output "^""Skipping: Windows ($verNoPatch) is below minimum $minVersion ($versionName)"^""; Exit 0; }; $RawRegistryPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice'; $AclChanges = [PSCustomObject]@{ PreviousOwner = $null; RemovedRules = @(); AddedRules = @(); InheritanceDisabled = $false; }; function Test-AccessModified { return $AclChanges.PreviousOwner -Or $AclChanges.RemovedRules.Count -gt 0 -Or $AclChanges.AddedRules.Count  -gt 0 -Or $AclChanges.InheritanceDisabled; }; function Open-RegistryKey { param ([Parameter(Mandatory=$true)][int]$Rights); <# [OutputType([Microsoft.Win32.RegistryKey])] # Not working through cmd.exe #>; $hive = $RawRegistryPath.Split('\')[0]; $pathWithoutHive = $RawRegistryPath.Substring($hive.Length + 1); try { $rootKey = switch ($hive) { 'HKCU' { [Microsoft.Win32.Registry]::CurrentUser }; 'HKLM' { [Microsoft.Win32.Registry]::LocalMachine }; default { Write-Error "^""Internal error: Unknown registry hive ($hive)."^""; Exit 1; }; }; $key = $rootKey.OpenSubKey( $pathWithoutHive, [Microsoft.Win32.RegistryKeyPermissionCheck]::ReadWriteSubTree, $Rights ); } catch { throw "^""Error when opening '$pathWithoutHive' on '$hive' hive: $_"^""; }; if (-Not $key) { throw "^""Unknown error when opening '$pathWithoutHive' on '$hive' hive."^""; }; return $key; }; function Grant-Permissions { Write-Host "^""Granting permissions to '$RawRegistryPath' registry key."^""; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::TakeOwnership); $acl = $subkey.GetAccessControl(); $owner = $acl.GetOwner([System.Security.Principal.NTAccount]); if ($owner -eq $adminAccount) { $subkey.Close(); } else { $AclChanges.PreviousOwner = $owner; $acl.SetOwner($adminAccount); $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host "^""Successfully took ownership from '$($owner.Value)'."^""; }; } catch { Write-Warning "^""Failed to take ownership. Error: $($_.Exception.Message)"^""; }; try { $subkey = Open-RegistryKey -Rights ([System.Security.AccessControl.RegistryRights]::ChangePermissions); $acl = $subkey.GetAccessControl(); $adminFullControlExists = $acl.Access | Where-Object { $_.IdentityReference -eq $adminAccount -and $_.RegistryRights -eq [System.Security.AccessControl.RegistryRights]::FullControl -and $_.AccessControlType -eq [System.Security.AccessControl.AccessControlType]::Allow }; if (-Not $adminFullControlExists) { Write-Host 'Granting full control to administrators.'; $fullControlRule = New-Object System.Security.AccessControl.RegistryAccessRule( $adminAccount, [System.Security.AccessControl.RegistryRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $acl.AddAccessRule($fullControlRule); $AclChanges.AddedRules += $fullControlRule; }; if ($acl.AreAccessRulesProtected) { $acl.SetAccessRuleProtection($false, $false); $AclChanges.InheritanceDisabled = $true; }; $denyRules = @($acl.Access.Where({ $_.AccessControlType -eq 'Deny' })); foreach ($denyRule in $denyRules) { Write-Host "^""Removing a deny rule for '$($denyRule.IdentityReference)'."^""; if ($acl.RemoveAccessRule($denyRule)) { $AclChanges.RemovedRules += $denyRule; } else { Write-Warning 'Failed to remove the rule.'; }; }; if (-Not (Test-AccessModified)) { Write-Host 'No access modifications were necessary.'; $subkey.Close(); } else { $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully applied new access rules.'; }; } catch { Write-Warning "^""Failed to modify access. Error: $($_.Exception.Message)"^""; }; }; function Revoke-Permissions { Write-Host "^""Restoring permissions: '$RawRegistryPath'."^""; if (-Not (Test-AccessModified)) { Write-Host 'Skipping revoking permissions, they were not granted.'; return; } else { try { $subkey = Open-RegistryKey -Rights ( [System.Security.AccessControl.RegistryRights]::TakeOwnership -bor [System.Security.AccessControl.RegistryRights]::ChangePermissions ); $acl = $subkey.GetAccessControl(); if ($AclChanges.PreviousOwner) { Write-Host 'Restoring owner.'; $acl.SetOwner($AclChanges.PreviousOwner); }; foreach ($rule in $AclChanges.AddedRules) { Write-Host "^""Removing rule for '$($rule.IdentityReference)'."^""; if (-Not $acl.RemoveAccessRule($rule)) { Write-Warning 'Failed to remove the rule.'; }; }; foreach ($rule in $AclChanges.RemovedRules) { $acl.AddAccessRule($rule); Write-Host "^""Adding a rule for '$($rule.IdentityReference)'."^""; }; if ($AclChanges.InheritanceDisabled) { $acl.SetAccessRuleProtection($true, $true); Write-Host 'Restoring inheritance.'; }; $subkey.SetAccessControl($acl); $subkey.Close(); Write-Host 'Successfully restored permissions.'; } catch { Write-Warning "^""Failed to restore permissions. Error: $($_.Exception.Message)"^""; }; }; }; $data = 'MSEdgeHTM'; $rawType = 'REG_SZ'; $rawPath = 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.xhtml\UserChoice'; $value = 'ProgId'; $hive = $rawPath.Split('\')[0]; $path = "^""$($hive):$($rawPath.Substring($hive.Length))"^""; Write-Host "^""Restoring value '$value' at '$path' with type '$rawType' and value '$data'."^""; if (-Not $rawType) { throw "^""Internal privacy$([char]0x002E)sexy error: Data type is not provided for data '$data'."^""; }; if (-Not (Test-Path -LiteralPath $path)) { try { New-Item -Path $path -Force -ErrorAction Stop | Out-Null; Write-Host 'Successfully created registry key.'; } catch { throw "^""Failed to create registry key: $($_.Exception.Message)"^""; }; }; $currentData = Get-ItemProperty -LiteralPath $path -Name $value -ErrorAction SilentlyContinue | Select-Object -ExpandProperty $value; if ($currentData -eq $data) { Write-Host 'Skipping, no changes required, the registry data is already as expected.'; Exit 0; }; Grant-Permissions; try { $type = switch ($rawType) { 'REG_SZ' { 'String' }; 'REG_DWORD' { 'DWord' }; 'REG_QWORD' { 'QWord' }; 'REG_EXPAND_SZ' { 'ExpandString' }; default { throw "^""Internal privacy$([char]0x002E)sexy error: Failed to find data type for: '$rawType'."^""; }; }; Set-ItemProperty -LiteralPath $path -Name $value -Value $data -Type $type -Force -ErrorAction Stop; Write-Host 'Successfully restored the registry value.'; } catch { throw "^""Failed to restore the value: $($_.Exception.Message)"^""; } finally { Revoke-Permissions }"

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