I would like to do a Full System Restore. I don't use the PC anymore and would like to give it to my dad. It's not a name brand PC, I bought it put together from an independent Computer Store with Windows XP installed. They where not willing to tell me what 'f' button to push to do the restore and of course said they can do it for me but would have to charge me for it since it has a ghost partition that they would have to access. Can someone help me?