To resolve the issue where Microsoft Defender Antivirus (Windows Security) is showing "Administrator: Limited Access" with a blank white window, follow these steps:
-
Press
Windows Key + Xand selectWindows PowerShell (Admin)orCommand Prompt (Admin). -
In the elevated PowerShell or Command Prompt window, run the following command to disable the Microsoft Defender Antivirus service:
Get-Service -Name "MpCmdLine" | Stop-Service -
After disabling the service, run the following command to delete the Microsoft Defender Antivirus database:
Regsvr32 /n /i C:\Program Files\Windows Defender\MpCmdRun.dllThen, run the following command to recreate the database:
C:\Program Files\Windows Defender\MPENGINE.EXE -Scan -Fast -
Now, restart the Microsoft Defender Antivirus service:
Get-Service -Name "MpCmdLine" | Start-Service -
Close the PowerShell or Command Prompt window.
-
Restart your computer.
After restarting your computer, the Microsoft Defender Antivirus should function correctly without showing the "Administrator: Limited Access" blank white window.
Summary:
- Disable Microsoft Defender Antivirus service.
- Delete the Microsoft Defender Antivirus database.
- Recreate the Microsoft Defender Antivirus database.
- Restart the Microsoft Defender Antivirus service.
- Restart your computer.
References:
- Microsoft Defender Antivirus: https://docs.microsoft.com/en-us/windows/security/threat-protection/microsoft-defender-antivirus/
- Regsvr32 command: https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/regsvr32
- Get-Service and Stop-Service cmdlets: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/get-service?view=powershell-7.2
- Start-Service cmdlet: https://docs.microsoft.com/en-us/powershell/module/microsoft.powershell.management/start-service?view=powershell-7.2