It's virus....re-install xp...simple...
@cupid4u...
for such a small task dont take the pains of reinstalling WinXP...
just follow the apps prescribed by other members...
i would recommend using..
USB Disk Security [TRIAL] [
www.zbshareware.com/download.html]
USB Antivirus [TRIAL] [*www.usbantivirus.net/]
use the system settings restore feature and uninstall the tools...
-SUDE