Reset Your PC/ Reinstall Windows
If the various other tips here didn't repair your trouble, the one classic solution to repair Windows troubles-- apart from rebooting your COMPUTER, naturally-- is obtaining a fresh Windows installation. On contemporary versions of Windows-- that is, Windows 8, 8.1, and also 10-- it's simpler to get a fresh Windows installation than ever. You do not need to obtain Windows setup media as well as re-install Windows. Rather, you can merely make use of the "Reset your COMPUTER" feature built right into Windows to obtain a new, fresh Windows system. This resembles reinstalling Windows and also will clean your installed programs and system setups while keeping your documents.
You can always consider hiring a computer repair service to help you.