What happened to my Windows desktop background?

Episode 1102 (2:09:54)

JR from Carlsbad, CA

JR's laptop background went completely black one day. He can see the icons and everything, but the desktop background is completely black. He tried to change the images but it's still black. Leo says that sometimes Windows will turn the background black if it thinks the copy of Windows is unregistered. It may be there's a corrupted theme or drive. He should try using the recovery disk and choose "repair."