I maybe the only person that came across this problem where if you put a second hardive in your pc or an old one it refuses to recognise it or conflicts. and seeing as FDISK doesnt work in XP I found this to format the drive and partition it if you want as well.
its an ISO file so burn it to CD-Rom and boot it up, job done. Just watch you don't format your woring hardrive.
http://www.seagate.com/support/disc/dri ... scwiz.html