Open PowerShell with administrator privileges and execute the following statement:

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