My suggestion for you is to use a Bootable CD , something like BartPE or Ultimate Boot CD 4 Windows to reformat the drive and reinstall Windows XP http://www.ubcd4win.com/ It has tools to build the CD (You need a CD-ROM of Windows XP) and you can also install plugins to increase functionality. There are tools contained in the default installation that allow you to reformat and convert drives to NTFS from FAT12/16/32. Good luck. If you need a boot CD that's already made send me an e-mail @gmail with my username. Good luck!!