So my dad somehow managed to allow his computer to become highly infected with malware again. How he does this is beyond me, but that's for another time. Anyways, I quarantined about 60 infected files w/ Avira AntiVir and the detections have stopped since. They seemed relatively harmless until I tried fixing his theme/wallpaper... It seems as if the malware has removed the themes and the window where you can select a wallpaper image is not interactive; it's grayed-out. The registry editor was also disabled but i ran some scripts and that's perfectly fine now. I can't figure out which entries control this stuff, but I found similar entries before when his tabs were missing from the Display Properties window as well. So, I don't really know what to do for him as of now. The good thing is that he doesn't really care that he can't apply a desktop background, but it's not right and i would like to fix it. Is there any way I can reset the Display Properties? Computer is running XP Home service pack 3. Thanks in advance.