Originally Posted by GhOsT1321
I believe windows operating systems can only be installed once per motherboard, perhaps you are using a used windows installation disc?
No. Media is media. Only the license number is really important.
It is possible that your disk may be dirty or scratched, but I figure you would have checked that first. You may want to format the drive and try it fresh. Use GParted
to do the formatting for you as Window;s format tools is not all that great... especially the one with XP.