!!! Registry vorher sichern !!!

If you receive a Windows Update error, try the steps in Fix Windows Update errors. 
The steps and troubleshooters on that page will reset the Windows Update components for you.

https://support.microsoft.com/en-us/help/10164/fix-windows-update-errors
   ( Windows Update Troubleshooter  ->  http://aka.ms/diag_wu )

https://support.microsoft.com/en-us/help/971058/how-do-i-reset-windows-update-components

see ./Windows_Update_Troubleshooter