cmd
in the search bar, right-click on Command Prompt, and select Run as administrator. net stop wuauserv net stop cryptSvc net stop bits net stop msiserver
ren C:\Windows\SoftwareDistribution SoftwareDistribution.old ren C:\Windows\System32\catroot2 Catroot2.old
net start wuauserv net start cryptSvc net start bits net start msiserver
sfc /scannow