I just got this new computer for a workstation at work with windows 7. Our company has an inhouse program that is serviced from a company in canada, when they do maintenance they log into a VPN site and ask us to change our view to classic view because it is faster on there end. When they disconnect and i go to change back to windows 7 desktop my background goes black. The computer works perfectly but whatever i cahnge the background to it always goes black. We got 5 new workstations and my desk is the only one that has this issue. I have dual monitors and no one else does. Other than that they are identical. I am lost... Thanks for any help.