Open restore with run command and sfc in cmd

On keyboard press windows key then R a run box will pop up enter rstrui.exe to open system restore.
You can also run the system file checker utility built in to windows using a command prompt with admin privileges.
Windows key R cmd enter once in command prompt type "sfc /scannow" no quotes and make sure there is a space between sfc and the / this will repair any system protected files.You can also open cmd with search, right click ,run as admin.