Repair Windows 10, Reinstall Window Defender

https://www.wintips.org/fix-dism-0x800f081f-error-in-windows-10-8/

dism /export-image /SourceImageFile:"G:\CONGVIEC\Win10_1909_x64.esd" /SourceIndex:6 /DestinationImageFile:"G:\CONGVIEC\install1909x64.wim" /Compress:max /CheckIntegrity

DISM /Online /Cleanup-Image /AnalyzeComponentStore


DISM /Online /Cleanup-Image /RestoreHealth /Source:WIM:"G:\CONGVIEC\install1909x64.wim":1 /LimitAccess


DISM /Online /Enable-Feature /FeatureName:Windows-Defender /Source:WIM:"G:\CONGVIEC\install1909x64.wim":1

DISM /Online /Enable-Feature /FeatureName:Windows-Defender /Source:G:\CONGVIEC\install1909x64.wim

Để cài lại Windows Defender trong trường hợp Update Window lỗi:

Chạy các lệnh sau, nếu không được phải Repair lại bằng link trên

DISM.exe /Online /Cleanup-image /Scanhealth

DISM.exe /Online /Cleanup-image /Restorehealth

Tiếp theo chỉnh Policygpedit.msc

3. This is simply resolved by opening up Group Policy an d to edit the three following key under Computer configuration/Administrative Templates/Windows Components/Windows Defender Anti-Virus:

a. Allow antimalware service to startup with normal priority. (must be set to "Enabled")

b. Turn off Windows Defender Antivirus. (must be set to "Disabled")

c. Under subfolder Real-time Protection of Windows Defender set the policy "Turn off real-time protection". (must be set to "Disabled")

Bước 3: Chạy lại Window Update