Disable Microsoft Defender Core Service
- Windows onlyThis script improves your privacy on Windows
- Single actionThis page belongs to a script, containing basic changes to achieve a task.
- Impact: High
System Functionality / Data 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.
- Administrator rights requiredThis script requires privilege access to do the system changes
- 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 Defender Core service (MDCoreSvc
).
The Microsoft Defender Core service is a component of Defender Antivirus 1 2. It is included in Microsoft Defender for Endpoint suite. 1 2 3. It contributes to the stability and performance of Defender Antivirus 1.
This script improves privacy by disabling this service. It reduces data collection associated with Microsoft Defender Antivirus and Microsoft Defender for Endpoint.
It may also increase system performance by removing a background process.
However, disabling this service may reduce system security. As a core operating system component, its removal may also affect system stability.
Technical Details
The service is technically identified as MDCoreSvc
1 2 4 5.
Its executable is MpDefenderCoreService.exe
1 2 5 6.
This process is also known as "Antimalware Core Service" 1 2 6.
It's typically located in the %PROGRAMDATA%\Microsoft\Windows Defender\Platform\<version number>\
folder 6.
It may be found on modern versions of Windows 5.
Overview of default service statuses
According to tests, the availability of this service varies across different Windows versions, depending on the installed Defender antivirus updates.
OS Version | Status | Start type |
---|---|---|
Windows 10 (≥ 22H2) | 🟢 Running | Automatic |
Windows 11 (≥ 23H2) | 🟡 Missing | N/A |
- 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.
- 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 trackingDecreased Security
Some security features will be disabled or limitedThis script can be reversed, this action allows you to can restore the system security.
Sources
- Microsoft Defender Core service overview - Microsoft Defender for Endpoint. Microsoft Learn. learn.microsoft.com. (2024).
Original: https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-core-service-overview
Archived: https://web.archive.org/web/20240728143438/https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-core-service-overview - Microsoft Defender Antivirus in Windows Overview - Microsoft Defender for Endpoint. Microsoft Learn. learn.microsoft.com. (2024).
Original: https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-antivirus-windows
Archived: https://web.archive.org/web/20240609145624/https://learn.microsoft.com/en-us/defender-endpoint/microsoft-defender-antivirus-windows?view=o365-worldwide - How to fully Uninstall/Clean-up Microsoft Defender Endpoint - Microsoft Q&A. learn.microsoft.com. (2024).
Original: https://learn.microsoft.com/en-sg/answers/questions/1778162/how-to-fully-uninstall-clean-up-microsoft-defender
Archived: https://web.archive.org/web/20240728143825/https://learn.microsoft.com/en-sg/answers/questions/1778162/how-to-fully-uninstall-clean-up-microsoft-defender - [Bug]: Defender is not completely disabled · Issue #385 · undergroundwires/privacy.sexy. github.com. (2024).
Original: https://github.com/undergroundwires/privacy.sexy/issues/385
Archived: https://web.archive.org/web/20240728143822/https://github.com/undergroundwires/privacy.sexy/issues/385 - December 2023 - Microsoft 365 US Public Sector Roadmap Newsletter - Microsoft Community Hub. techcommunity.microsoft.com. (2024).
Original: https://techcommunity.microsoft.com/t5/public-sector-blog/december-2023-microsoft-365-us-public-sector-roadmap-newsletter/ba-p/4010161
Archived: https://web.archive.org/web/20240724234608/https://techcommunity.microsoft.com/t5/public-sector-blog/december-2023-microsoft-365-us-public-sector-roadmap-newsletter/ba-p/4010161 - MpDefenderCoreService.exe Windows process - What is it?. file.net. (2024).
Original: https://www.file.net/process/mpdefendercoreservice.exe.html
Archived: https://web.archive.org/web/20240724234556/https://www.file.net/process/mpdefendercoreservice.exe.html
Apply Now
Choose one of three ways to apply:
Download script
Download and run the script directly- No app needed
- Offline usage
- Easy-to-apply
- Free
- Open-source
Help
How to apply or restore "Disable Microsoft Defender Core Service" using script
- ≈ 2 min to complete
- Tools: Web Browser
- Difficulty: Simple
- ≈ 5 instructions
- 1
Download
Download the script file by clicking on thebutton above.
Use button above to restore changes. - 2
Keep the file
If warned by your browser, keep the file. - 3
Open
Open the downloaded file. - 4
Exit
Once it's done, press any key to exit the window. - 5
Restart
Restart your computer for all changes to take effect.
Apply with privacy.sexy
Guided, automated application with safety checks- Recommended for most users
- Includes safety checks
- Free
- Open-source
- Popular
- Offline/Online usage
Help
How to apply or restore "Disable Microsoft Defender Core Service" using privacy.sexy
- ≈ 3 min to complete
- Tools: privacy.sexy
- Difficulty: Simple
- ≈ 4 instructions
- 2
Choose script
- Search for the script name: Disable Microsoft Defender Core Service
- Check the script by clicking on the checkbox.
- 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.
- Apply
- Revert
:: Check and terminate the running process "MpDefenderCoreService.exe"
tasklist /fi "ImageName eq MpDefenderCoreService.exe" /fo csv 2>NUL | find /i "MpDefenderCoreService.exe">NUL && (
echo MpDefenderCoreService.exe is running and will be killed.
taskkill /f /im MpDefenderCoreService.exe
) || (
echo Skipping, MpDefenderCoreService.exe is not running.
)
:: Configure termination of "MpDefenderCoreService.exe" immediately upon its startup
:: Set the registry value: "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpDefenderCoreService.exe!Debugger"
PowerShell -ExecutionPolicy Unrestricted -Command "$registryPath = 'HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpDefenderCoreService.exe'; $data = '%SYSTEMROOT%\System32\taskkill.exe'; reg add 'HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\MpDefenderCoreService.exe' /v 'Debugger' /t 'REG_SZ' /d "^""$data"^"" /f"
:: Add a rule to prevent the executable "MpDefenderCoreService.exe" from running via File Explorer
PowerShell -ExecutionPolicy Unrestricted -Command "$executableFilename='MpDefenderCoreService.exe'; try { $registryPathForDisallowRun='HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\DisallowRun'; $existingBlockEntries = Get-ItemProperty -Path "^""$registryPathForDisallowRun"^"" -ErrorAction Ignore; $nextFreeRuleIndex = 1; if ($existingBlockEntries) { $existingBlockingRuleForExecutable = $existingBlockEntries.PSObject.Properties | Where-Object { $_.Value -eq $executableFilename }; if ($existingBlockingRuleForExecutable) { $existingBlockingRuleIndexForExecutable = $existingBlockingRuleForExecutable.Name; Write-Output "^""Skipping, no action needed: '$executableFilename' is already blocked under rule index `"^""$existingBlockingRuleIndexForExecutable`"^""."^""; exit 0; }; $occupiedRuleIndexes = $existingBlockEntries.PSObject.Properties | Where-Object { $_.Name -Match '^\d+$' } | Select -ExpandProperty Name; if ($occupiedRuleIndexes) { while ($occupiedRuleIndexes -Contains $nextFreeRuleIndex) { $nextFreeRuleIndex += 1; }; }; }; Write-Output "^""Adding block rule for `"^""$executableFilename`"^"" under rule index `"^""$nextFreeRuleIndex`"^""."^""; if (!(Test-Path $registryPathForDisallowRun)) { New-Item -Path "^""$registryPathForDisallowRun"^"" -Force -ErrorAction Stop | Out-Null; }; New-ItemProperty -Path "^""$registryPathForDisallowRun"^"" -Name "^""$nextFreeRuleIndex"^"" -PropertyType String -Value "^""$executableFilename"^"" ` -ErrorAction Stop | Out-Null; Write-Output "^""Successfully blocked `"^""$executableFilename`"^"" with rule index `"^""$nextFreeRuleIndex`"^""."^""; } catch { Write-Error "^""Failed to block `"^""$executableFilename`"^"": $_"^""; Exit 1; }"
:: Activate the DisallowRun policy to block specified programs from running via File Explorer
PowerShell -ExecutionPolicy Unrestricted -Command "try { $fileExplorerDisallowRunRegistryPath = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer'; $currentDisallowRunPolicyValue = Get-ItemProperty -Path "^""$fileExplorerDisallowRunRegistryPath"^"" -Name 'DisallowRun' -ErrorAction Ignore | Select -ExpandProperty DisallowRun; if ([string]::IsNullOrEmpty($currentDisallowRunPolicyValue)) { Write-Output "^""Creating DisallowRun policy at `"^""$fileExplorerDisallowRunRegistryPath`"^""."^""; if (!(Test-Path $fileExplorerDisallowRunRegistryPath)) { New-Item -Path "^""$fileExplorerDisallowRunRegistryPath"^"" -Force -ErrorAction Stop | Out-Null; }; New-ItemProperty -Path "^""$fileExplorerDisallowRunRegistryPath"^"" -Name 'DisallowRun' -Value 1 -PropertyType DWORD -Force -ErrorAction Stop | Out-Null; Write-Output 'Successfully activated DisallowRun policy.'; Exit 0; }; if ($currentDisallowRunPolicyValue -eq 1) { Write-Output 'Skipping, no action needed: DisallowRun policy is already in place.'; Exit 0; }; Write-Output 'Updating DisallowRun policy from unexpected value `"^""$currentDisallowRunPolicyValue`"^"" to `"^""1`"^"".'; Set-ItemProperty -Path "^""$fileExplorerDisallowRunRegistryPath"^"" -Name 'DisallowRun' -Value 1 -Type DWORD -Force -ErrorAction Stop | Out-Null; Write-Output 'Successfully activated DisallowRun policy.'; } catch { Write-Error "^""Failed to activate DisallowRun policy: $_"^""; Exit 1; }"
:: Suggest restarting computer for changes to take effect
PowerShell -ExecutionPolicy Unrestricted -Command "$message = 'For the changes to fully take effect, please restart your computer.'; $warn = $false; if ($warn) { Write-Warning "^""$message"^""; } else { Write-Host "^""Note: "^"" -ForegroundColor Blue -NoNewLine; Write-Output "^""$message"^""; }"
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Help
How to apply or restore "Disable Microsoft Defender Core Service" using commands
- ≈ 2 min to complete
- Tools: Command Prompt
- Difficulty: Medium
- ≈ 3 instructions
- 1
Open Command Prompt
Open Command Prompt as Administrator. - 2
Copy code
Copy the code: - 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
These people have authored this documentation and written its scripts:
Reviewed By
This guide has undergone comprehensive auditing and peer review:Expert review by undergroundwires
- Verified technical accuracy and editorial standards
- Assessed system impact and user privacy risks
Public review by large community
- Privacy enthusiasts and professionals peer-reviewed
- Millions of end-users tested across different environments
History
We continually monitor our guides, their impact and all other privacy options. We update our guides when new information becomes available. On every update, we publicly store who made the change, what has been changed, why the change was made and when the change was made.