I was reinstalling some older games I had, and one of them messed something up with XP because now I don't have an icon for stuff like "my documents", "my computer", cd-drive, "control panel", and "network places". All I get now is a default, white square-looking box for the icon. It's annoying to look at. How can this be fixed? Rebooting didn't help, and I also tried switching between XP theme and Classic theme, but no luck.