I've not had to try this myself yet, but I think you need to place your XP CD in the drive, and reboot, at the same time tapping the F8 key.
This will bring up the screen with several options on, and one of these is to format your drive. J.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone