I'm wondering about whether you can restore a computer's operating system it was shipped with, as with my computer, on the sticker, it states it shipped with Vista, but when I bought it on Craigslist, the operating system installed was XP. There is no partition for Vista, but is there any other way to restore it to Vista, like with the BIOS or something like that? (I don't know if this can do anything, as I have a restore disk for another computer to restore Vista on that computer, could that be used on this computer or to be more specific, is there a method of somehow using that restore disk with the computer that has XP?)