I want to format my pc and re-install windows, i have the original xp disc and i have set the dvd drive to boot but it comes up with the mesage "please insert correct media and select bootable device" or something very similar. i have tied the dvd on primary and slave settings but i still get that message. It's a dvd/rw but it play disc normally would this affect it at all?. any ideas would be much appreciated.