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Disable Microsoft Security WFP callout driver

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Works with Windows 10 and 11Works with Windows Vista, XP, 7, 8, 10, 11, and Windows Server 2008 or newer.
  • Single actionThis page belongs to a script, containing basic changes to achieve a task.
  • Windows onlyThis script improves your privacy on Windows
  • Impact: HighSystem Functionality Loss Risk: High
    This action improves privacy with high impact when you run the recommended script.
  • Batch (batchfile)These changes use Windows system commands to update your settings.
  • Fully reversible

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

    The restore/revert methods provided here can help you fix issues.

Overview​

This script disables the Microsoft Security WFP callout driver and its associated files.

Microsoft refers to this component as Microsoft Security WFP Callout Driver 1. This is a kernel-mode driver 1. Windows uses this driver to monitor and control network traffic for security purposes 2.

It is part of the Windows Filtering Platform (WFP). WFP provides a framework for building network filtering applications 2. It is used by built-in Defender Firewall to filter network packets 2. It works on TCP/IP communication using TCP/IP Protocol Driver (Tcpip) 1.

The driver is a callout driver. This means that it processes network data beyond simple filtering 3. It performs deep inspections, modifies packet or stream data, and logs network activity 3. This helps manage and enforce security policies for network traffic 4.

Disabling this driver may enhance privacy by preventing the system from performing detailed network data inspections and logging. Additionally, the script may slightly boost system performance and shorten boot times by stopping the driver from loading at startup.

On On modern Windows versions, this driver is either missing entirely or is stopped and set to Manual by default 1. This means it does not actively run unless specifically triggered.

However, disabling this driver poses security risks:

  • Reduced threat detection: Your system may become more vulnerable to network-based attacks.
  • Reduced firewall effectiveness: The Defender Firewall may not work as effectively to monitor and block malicious network traffic.
  • Potential system instability: Other security features or applications that depend on this driver may not function properly.
Caution

Disabling this driver may reduce your system's network security. Consider having alternative security measures in place.

Technical Details​

This script:

  • Disables its service named MsSecWfp 1.
  • Removes the driver file.
    • This driver file is located at %SYSTEMROOT%\System32\drivers\mssecwfp.sys 1 5.
    • This file exists on Windows 10 Pro (≥ 22H2) and Windows 11 Pro ≥ 22H2 but not on Windows 11 21H2.
  • Removes its associated library.
    • This library is located at %SYSTEMROOT%\System32\mssecwfpu.dll [6].
    • It is named Microsoft Security Network Isolation WFP Library [6].

While some sources may mention MsSecFltWfp.sys, this file has not been found in any version of Windows.

OS VersionStatusStart type
Windows 10 (≥ 22H2)🔴 StoppedManual
Windows 11 (21H2)🟡 MissingN/A
Windows 11 (≥ 22H2)🔴 StoppedManual

[6]: https://archive.ph/2024.10.09-120635/https://x.com/XenoPanther/status/1603106223129526273 "Xeno on X: "Changes between 25262 and 25267: mssecwfpu.dll (Microsoft Security Network Isolation WFP Library) has been added to System32. wslg.exe has been removed now exists in the SystemApps folder -" / X | x.com"

  1. Not Advised

    This script should only be used by advanced users.

    This script is not recommended for daily use as it breaks important functionality.

    Consider creating a system restore point before doing any changes.

  2. Security Trade-off

    This action prioritizes privacy over certain security features. It's not recommended and should only be used by advanced users after understanding its implications.

    Increased Privacy

    Enhanced privacy through reduced data collection and tracking

    Decreased Security

    Some security features will be disabled or limited

    This script can be reversed, this allows you to restore the default system security.

Sources
PrivacyLearn.com maintains strict sourcing standards for accuracy, integrity and up-to-date content. Our content relies on authoritative sources including vendor documentation, industry standards, and verified research. Learn more about our verification process and quality standards in our editorial standards page.

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Help

How to apply or restore "Disable Microsoft Security WFP callout driver" using script​

  • ≈ 2 min to complete
  • Tools: Web Browser
  • Difficulty: Simple
  • ≈ 5 instructions
  1. 1

    Download

    Download the script file by clicking on the   Apply protection  button above.
    Use   Undo protection button above to restore changes.
  2. 2

    Keep the file

    If warned by your browser, keep the file.
  3. 3

    Open

    Open the downloaded file.
  4. 4

    Exit

    Once it's done, press any key to exit the window.
  5. 5

    Restart

    Restart your computer for all changes to take effect.

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How to apply or restore "Disable Microsoft Security WFP callout driver" using privacy.sexy​

  • ≈ 3 min to complete
  • Tools: privacy.sexy
  • Difficulty: Simple
  • ≈ 4 instructions
privacy.sexy is free and open-source application that lets securely apply this action easily with more advanced options.
  1. 1

    Open or download

    Open or download the desktop application
  2. 2

    Choose script

    1. Search for the script name: Disable Microsoft Security WFP callout driver
    2. Check the script by clicking on the checkbox.
  3. 3

    Run

    Click on ▶️ Run button at the bottom of the page.

    This button only appears on desktop version (recommended). On browser, use 💾 Save button.

Run commands​

Copy and run commands manually Requires technical knowledge
Apply changes
:: Disable service(s): `MsSecWfp`
PowerShell -ExecutionPolicy Unrestricted -Command "$serviceName = 'MsSecWfp'; Write-Host "^""Disabling service: `"^""$serviceName`"^""."^""; <# -- 1. Skip if service does not exist #>; $service = Get-Service -Name $serviceName -ErrorAction SilentlyContinue; if(!$service) { Write-Host "^""Service `"^""$serviceName`"^"" could not be not found, no need to disable it."^""; Exit 0; }; <# -- 2. Stop if running #>; if ($service.Status -eq [System.ServiceProcess.ServiceControllerStatus]::Running) { Write-Host "^""`"^""$serviceName`"^"" is running, stopping it."^""; try { Stop-Service -Name "^""$serviceName"^"" -Force -ErrorAction Stop; Write-Host "^""Stopped `"^""$serviceName`"^"" successfully."^""; } catch { Write-Warning "^""Could not stop `"^""$serviceName`"^"", it will be stopped after reboot: $_"^""; }; } else { Write-Host "^""`"^""$serviceName`"^"" is not running, no need to stop."^""; }; <# -- 3. Skip if already disabled #>; $startupType = $service.StartType <# Does not work before .NET 4.6.1 #>; if (!$startupType) { $startupType = (Get-WmiObject -Query "^""Select StartMode From Win32_Service Where Name='$serviceName'"^"" -ErrorAction Ignore).StartMode; if(!$startupType) { $startupType = (Get-WmiObject -Class Win32_Service -Property StartMode -Filter "^""Name='$serviceName'"^"" -ErrorAction Ignore).StartMode; }; }; if ($startupType -eq 'Disabled') { Write-Host "^""$serviceName is already disabled, no further action is needed"^""; Exit 0; }; <# -- 4. Disable service #>; try { Set-Service -Name "^""$serviceName"^"" -StartupType Disabled -Confirm:$false -ErrorAction Stop; Write-Host "^""Disabled `"^""$serviceName`"^"" successfully."^""; } catch { Write-Error "^""Could not disable `"^""$serviceName`"^"": $_"^""; }"
:: Soft delete files matching pattern: "%SYSTEMROOT%\System32\drivers\mssecwfp.sys" with additional permissions 
PowerShell -ExecutionPolicy Unrestricted -Command "$pathGlobPattern = "^""%SYSTEMROOT%\System32\drivers\mssecwfp.sys"^""; $expandedPath = [System.Environment]::ExpandEnvironmentVariables($pathGlobPattern); Write-Host "^""Searching for items matching pattern: `"^""$($expandedPath)`"^""."^""; $renamedCount   = 0; $skippedCount   = 0; $failedCount    = 0; Add-Type -TypeDefinition "^""using System;`r`nusing System.Runtime.InteropServices;`r`npublic class Privileges {`r`n    [DllImport(`"^""advapi32.dll`"^"", ExactSpelling = true, SetLastError = true)]`r`n    internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,`r`n        ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);`r`n    [DllImport(`"^""advapi32.dll`"^"", ExactSpelling = true, SetLastError = true)]`r`n    internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);`r`n    [DllImport(`"^""advapi32.dll`"^"", SetLastError = true)]`r`n    internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);`r`n    [StructLayout(LayoutKind.Sequential, Pack = 1)]`r`n    internal struct TokPriv1Luid {`r`n        public int Count;`r`n        public long Luid;`r`n        public int Attr;`r`n    }`r`n    internal const int SE_PRIVILEGE_ENABLED = 0x00000002;`r`n    internal const int TOKEN_QUERY = 0x00000008;`r`n    internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;`r`n    public static bool AddPrivilege(string privilege) {`r`n        try {`r`n            bool retVal;`r`n            TokPriv1Luid tp;`r`n            IntPtr hproc = GetCurrentProcess();`r`n            IntPtr htok = IntPtr.Zero;`r`n            retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);`r`n            tp.Count = 1;`r`n            tp.Luid = 0;`r`n            tp.Attr = SE_PRIVILEGE_ENABLED;`r`n            retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);`r`n            retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);`r`n            return retVal;`r`n        } catch (Exception ex) {`r`n            throw new Exception(`"^""Failed to adjust token privileges`"^"", ex);`r`n        }`r`n    }`r`n    public static bool RemovePrivilege(string privilege) {`r`n        try {`r`n            bool retVal;`r`n            TokPriv1Luid tp;`r`n            IntPtr hproc = GetCurrentProcess();`r`n            IntPtr htok = IntPtr.Zero;`r`n            retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);`r`n            tp.Count = 1;`r`n            tp.Luid = 0;`r`n            tp.Attr = 0;  // This line is changed to revoke the privilege`r`n            retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);`r`n            retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);`r`n            return retVal;`r`n        } catch (Exception ex) {`r`n            throw new Exception(`"^""Failed to adjust token privileges`"^"", ex);`r`n        }`r`n    }`r`n    [DllImport(`"^""kernel32.dll`"^"", CharSet = CharSet.Auto)]`r`n    public static extern IntPtr GetCurrentProcess();`r`n}"^""; [Privileges]::AddPrivilege('SeRestorePrivilege') | Out-Null; [Privileges]::AddPrivilege('SeTakeOwnershipPrivilege') | Out-Null; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); $adminFullControlAccessRule = New-Object System.Security.AccessControl.FileSystemAccessRule( $adminAccount, [System.Security.AccessControl.FileSystemRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $foundAbsolutePaths = @(); try { $foundAbsolutePaths += @(; Get-Item -Path $expandedPath -ErrorAction Stop | Select-Object -ExpandProperty FullName; ); } catch [System.Management.Automation.ItemNotFoundException] { <# Swallow, do not run `Test-Path` before, it's unreliable for globs requiring extra permissions #>; }; $foundAbsolutePaths = $foundAbsolutePaths | Select-Object -Unique | Sort-Object -Property { $_.Length } -Descending; if (!$foundAbsolutePaths) { Write-Host 'Skipping, no items available.'; exit 0; }; Write-Host "^""Initiating processing of $($foundAbsolutePaths.Count) items from `"^""$expandedPath`"^""."^""; foreach ($path in $foundAbsolutePaths) { if (Test-Path -Path $path -PathType Container) { Write-Host "^""Skipping folder (not its contents): `"^""$path`"^""."^""; $skippedCount++; continue; }; if($revert -eq $true) { if (-not $path.EndsWith('.OLD')) { Write-Host "^""Skipping non-backup file: `"^""$path`"^""."^""; $skippedCount++; continue; }; } else { if ($path.EndsWith('.OLD')) { Write-Host "^""Skipping backup file: `"^""$path`"^""."^""; $skippedCount++; continue; }; }; $originalFilePath = $path; Write-Host "^""Processing file: `"^""$originalFilePath`"^""."^""; if (-Not (Test-Path $originalFilePath)) { Write-Host "^""Skipping, file `"^""$originalFilePath`"^"" not found."^""; $skippedCount++; exit 0; }; $originalAcl = Get-Acl -Path "^""$originalFilePath"^""; $accessGranted = $false; try { $acl = Get-Acl -Path "^""$originalFilePath"^""; $acl.SetOwner($adminAccount) <# Take Ownership (because file is owned by TrustedInstaller) #>; $acl.AddAccessRule($adminFullControlAccessRule) <# Grant rights to be able to move the file #>; Set-Acl -Path $originalFilePath -AclObject $acl -ErrorAction Stop; $accessGranted = $true; } catch { Write-Warning "^""Failed to grant access to `"^""$originalFilePath`"^"": $($_.Exception.Message)"^""; }; if ($revert -eq $true) { $newFilePath = $originalFilePath.Substring(0, $originalFilePath.Length - 4); } else { $newFilePath = "^""$($originalFilePath).OLD"^""; }; try { Move-Item -LiteralPath "^""$($originalFilePath)"^"" -Destination "^""$newFilePath"^"" -Force -ErrorAction Stop; Write-Host "^""Successfully processed `"^""$originalFilePath`"^""."^""; $renamedCount++; if ($accessGranted) { try { Set-Acl -Path $newFilePath -AclObject $originalAcl -ErrorAction Stop; } catch { Write-Warning "^""Failed to restore access on `"^""$newFilePath`"^"": $($_.Exception.Message)"^""; }; }; } catch { Write-Error "^""Failed to rename `"^""$originalFilePath`"^"" to `"^""$newFilePath`"^"": $($_.Exception.Message)"^""; $failedCount++; if ($accessGranted) { try { Set-Acl -Path $originalFilePath -AclObject $originalAcl -ErrorAction Stop; } catch { Write-Warning "^""Failed to restore access on `"^""$originalFilePath`"^"": $($_.Exception.Message)"^""; }; }; }; }; if (($renamedCount -gt 0) -or ($skippedCount -gt 0)) { Write-Host "^""Successfully processed $renamedCount items and skipped $skippedCount items."^""; }; if ($failedCount -gt 0) { Write-Warning "^""Failed to process $($failedCount) items."^""; }; [Privileges]::RemovePrivilege('SeRestorePrivilege') | Out-Null; [Privileges]::RemovePrivilege('SeTakeOwnershipPrivilege') | Out-Null"
:: Soft delete files matching pattern: "%SYSTEMROOT%\System32\mssecwfpu.dll" with additional permissions 
PowerShell -ExecutionPolicy Unrestricted -Command "$pathGlobPattern = "^""%SYSTEMROOT%\System32\mssecwfpu.dll"^""; $expandedPath = [System.Environment]::ExpandEnvironmentVariables($pathGlobPattern); Write-Host "^""Searching for items matching pattern: `"^""$($expandedPath)`"^""."^""; $renamedCount   = 0; $skippedCount   = 0; $failedCount    = 0; Add-Type -TypeDefinition "^""using System;`r`nusing System.Runtime.InteropServices;`r`npublic class Privileges {`r`n    [DllImport(`"^""advapi32.dll`"^"", ExactSpelling = true, SetLastError = true)]`r`n    internal static extern bool AdjustTokenPrivileges(IntPtr htok, bool disall,`r`n        ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen);`r`n    [DllImport(`"^""advapi32.dll`"^"", ExactSpelling = true, SetLastError = true)]`r`n    internal static extern bool OpenProcessToken(IntPtr h, int acc, ref IntPtr phtok);`r`n    [DllImport(`"^""advapi32.dll`"^"", SetLastError = true)]`r`n    internal static extern bool LookupPrivilegeValue(string host, string name, ref long pluid);`r`n    [StructLayout(LayoutKind.Sequential, Pack = 1)]`r`n    internal struct TokPriv1Luid {`r`n        public int Count;`r`n        public long Luid;`r`n        public int Attr;`r`n    }`r`n    internal const int SE_PRIVILEGE_ENABLED = 0x00000002;`r`n    internal const int TOKEN_QUERY = 0x00000008;`r`n    internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;`r`n    public static bool AddPrivilege(string privilege) {`r`n        try {`r`n            bool retVal;`r`n            TokPriv1Luid tp;`r`n            IntPtr hproc = GetCurrentProcess();`r`n            IntPtr htok = IntPtr.Zero;`r`n            retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);`r`n            tp.Count = 1;`r`n            tp.Luid = 0;`r`n            tp.Attr = SE_PRIVILEGE_ENABLED;`r`n            retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);`r`n            retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);`r`n            return retVal;`r`n        } catch (Exception ex) {`r`n            throw new Exception(`"^""Failed to adjust token privileges`"^"", ex);`r`n        }`r`n    }`r`n    public static bool RemovePrivilege(string privilege) {`r`n        try {`r`n            bool retVal;`r`n            TokPriv1Luid tp;`r`n            IntPtr hproc = GetCurrentProcess();`r`n            IntPtr htok = IntPtr.Zero;`r`n            retVal = OpenProcessToken(hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok);`r`n            tp.Count = 1;`r`n            tp.Luid = 0;`r`n            tp.Attr = 0;  // This line is changed to revoke the privilege`r`n            retVal = LookupPrivilegeValue(null, privilege, ref tp.Luid);`r`n            retVal = AdjustTokenPrivileges(htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero);`r`n            return retVal;`r`n        } catch (Exception ex) {`r`n            throw new Exception(`"^""Failed to adjust token privileges`"^"", ex);`r`n        }`r`n    }`r`n    [DllImport(`"^""kernel32.dll`"^"", CharSet = CharSet.Auto)]`r`n    public static extern IntPtr GetCurrentProcess();`r`n}"^""; [Privileges]::AddPrivilege('SeRestorePrivilege') | Out-Null; [Privileges]::AddPrivilege('SeTakeOwnershipPrivilege') | Out-Null; $adminSid = New-Object System.Security.Principal.SecurityIdentifier 'S-1-5-32-544'; $adminAccount = $adminSid.Translate([System.Security.Principal.NTAccount]); $adminFullControlAccessRule = New-Object System.Security.AccessControl.FileSystemAccessRule( $adminAccount, [System.Security.AccessControl.FileSystemRights]::FullControl, [System.Security.AccessControl.AccessControlType]::Allow ); $foundAbsolutePaths = @(); try { $foundAbsolutePaths += @(; Get-Item -Path $expandedPath -ErrorAction Stop | Select-Object -ExpandProperty FullName; ); } catch [System.Management.Automation.ItemNotFoundException] { <# Swallow, do not run `Test-Path` before, it's unreliable for globs requiring extra permissions #>; }; $foundAbsolutePaths = $foundAbsolutePaths | Select-Object -Unique | Sort-Object -Property { $_.Length } -Descending; if (!$foundAbsolutePaths) { Write-Host 'Skipping, no items available.'; exit 0; }; Write-Host "^""Initiating processing of $($foundAbsolutePaths.Count) items from `"^""$expandedPath`"^""."^""; foreach ($path in $foundAbsolutePaths) { if (Test-Path -Path $path -PathType Container) { Write-Host "^""Skipping folder (not its contents): `"^""$path`"^""."^""; $skippedCount++; continue; }; if($revert -eq $true) { if (-not $path.EndsWith('.OLD')) { Write-Host "^""Skipping non-backup file: `"^""$path`"^""."^""; $skippedCount++; continue; }; } else { if ($path.EndsWith('.OLD')) { Write-Host "^""Skipping backup file: `"^""$path`"^""."^""; $skippedCount++; continue; }; }; $originalFilePath = $path; Write-Host "^""Processing file: `"^""$originalFilePath`"^""."^""; if (-Not (Test-Path $originalFilePath)) { Write-Host "^""Skipping, file `"^""$originalFilePath`"^"" not found."^""; $skippedCount++; exit 0; }; $originalAcl = Get-Acl -Path "^""$originalFilePath"^""; $accessGranted = $false; try { $acl = Get-Acl -Path "^""$originalFilePath"^""; $acl.SetOwner($adminAccount) <# Take Ownership (because file is owned by TrustedInstaller) #>; $acl.AddAccessRule($adminFullControlAccessRule) <# Grant rights to be able to move the file #>; Set-Acl -Path $originalFilePath -AclObject $acl -ErrorAction Stop; $accessGranted = $true; } catch { Write-Warning "^""Failed to grant access to `"^""$originalFilePath`"^"": $($_.Exception.Message)"^""; }; if ($revert -eq $true) { $newFilePath = $originalFilePath.Substring(0, $originalFilePath.Length - 4); } else { $newFilePath = "^""$($originalFilePath).OLD"^""; }; try { Move-Item -LiteralPath "^""$($originalFilePath)"^"" -Destination "^""$newFilePath"^"" -Force -ErrorAction Stop; Write-Host "^""Successfully processed `"^""$originalFilePath`"^""."^""; $renamedCount++; if ($accessGranted) { try { Set-Acl -Path $newFilePath -AclObject $originalAcl -ErrorAction Stop; } catch { Write-Warning "^""Failed to restore access on `"^""$newFilePath`"^"": $($_.Exception.Message)"^""; }; }; } catch { Write-Error "^""Failed to rename `"^""$originalFilePath`"^"" to `"^""$newFilePath`"^"": $($_.Exception.Message)"^""; $failedCount++; if ($accessGranted) { try { Set-Acl -Path $originalFilePath -AclObject $originalAcl -ErrorAction Stop; } catch { Write-Warning "^""Failed to restore access on `"^""$originalFilePath`"^"": $($_.Exception.Message)"^""; }; }; }; }; if (($renamedCount -gt 0) -or ($skippedCount -gt 0)) { Write-Host "^""Successfully processed $renamedCount items and skipped $skippedCount items."^""; }; if ($failedCount -gt 0) { Write-Warning "^""Failed to process $($failedCount) items."^""; }; [Privileges]::RemovePrivilege('SeRestorePrivilege') | Out-Null; [Privileges]::RemovePrivilege('SeTakeOwnershipPrivilege') | Out-Null"
Help

How to apply or restore "Disable Microsoft Security WFP callout driver" using commands​

  • ≈ 2 min to complete
  • Tools: Command Prompt
  • Difficulty: Medium
  • ≈ 3 instructions
 View step-by-step guide with screenshots
  1. 1

    Open Command Prompt

    Open Command Prompt as Administrator.
  2. 2

    Copy code

    Copy the code:
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  3. 3

    Paste & run

    Paste the commands into Command Prompt and press Enter to run.

    Some changes require a system restart to take effect

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About the Creators​

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