You must start the program via the command prompt with administrator rights:ġ Click the Windows Start button at the bottom left of the screen.Ģ Enter the command 'cmd' in the search field. Windows includes what is known as a system file checker (SFC) with which you can check the system files and restore them if necessary. To repair defective Windows system files, proceed as follows: Without to knowing the exact details, I guess 'Windows system files' are defective. I don't think that OC had any impact on your Windows system.