I am trying to reinstall XP pro on my dell. i have a disk that i got and the key on the sticker but the disk and key have some sort of mismatch. is there anyway to tell what version the key works with. the sticker does say xp pro on it. my disk is a dell pro with sp3. i was reading that the number on the sticket that starts with x lets you know what sp the key will will owrk with. is that true
thanks