★★★★ Delete the backup files left by the update (you can also use security guards or optimization software to slim down and delete the system).
★★★★ Look here.
Microsoft. The system's. NET Framework is corrupted.
Start-Control Panel-Programs and Functions-Turn windows functions on or off in the upper left corner -Net 3.5. 1. If it is checked, please uncheck it and re-complete the check-OK-Repair End-Restart the computer.
Just try it.