Two slick OnLine websites can help fix errors in your Windows.
IF THERE IS NOTHING WRONG, DO NOT MUCK AROUND !
But if your specific problem is listed, go though the steps. Peter had geat success with 2 of these fixit tools. CLICK

If you have a Dell, go here for updates and fixes-> CLICK and there are also links that work for any brand as well.

How FaceBook security fails CLICK