I'm reviving a pc for my boy. It has a trial version of vista ult on it. I want to reformat with my xp disk. So far, I've gotten no progress. Booting with the disk in gives me vista saying that windows did not shut down properly. Options for safe mode and the like appear. I want to reformat. Did get into dos and set cd to be first boot device, and the pc loops on the previous mention. Looking for another tactic. Thank you.