2nd EDIT: Do you have any experience with PCAnywhere or any other remote admin program?? That's kinda what it sounds like, when you connect from a remote location, some programs do that (aforementioned one specifically) so that you know that there is a remote admin. did your Background CHANGE?? If so, it sounds like someone was/is trying to remote admin your computer.
no experience with pc anywhere. background didn't change, the screen just turned blank and white.
