XP Display properties messed up

[DrumminBoy]

My computer was feeling a little sluggish tonight, so i thought i would change from my OS X theme to "Windows Classic", and when i did it everything turned black except for a few icons. I've restarted twice, and it still turns black when i log in. I can access my start bar and most icons, but i cant see anything else besides black. Basically, my problem is that i cant go back to change my theme setting because the whole screen is black. Any help?? (i'm posting from a guest xp user account right now)

 

[amdskip]

Can you restore your system to an earlier point in time?