I've installed WinXP Pro twice on an Athlon 700Mhz 512Mb system, and after a few days, my XP theme disappears. The taskbar, windows, everything looks like Windows 98/2000 again, with no skins. I CAN go into the Effects window, and I notice that the XP styles is unchecked. If I check the box again, the skins still won't come back! Also, I can go into the Themes selection screen, change the theme to Classic, apply it, and then change it back to Windows XP theme, and the skin still won't show up. Again, this happens each time I install XP. Originally, I suspected a file getting corrupted, so I installed an IDE Busmaster update on the next re-installation. A few days later, again, it disappears. Anyone have any ideas on how to diagnose this problem? I'm at a loss here.