Hi, This morning, I turned on my PC and Windows Update shown me 0x80070643 error for two Windows Defender Definitions. I tried this two commands as Admin: “%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe” -RemoveDefinitions -All “%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe” -SignatureUpdate So I rebooted my PC and now I get 0x80072af9 error for the same Definition Updates. Any suggestions?