Just a wild guess, but it might work with luck. It sounds like your back up and restore function has gone berserk. I think that when you log on your computer is restoring your files (from back up and restore) at a point in time when you did not have anything to back up. I would put a file in documents and copy it with back up and restore, shut down, boot up and see what happens. If that does not work shut down the back up and restore function.