I recently got my own version of windows 7 from my school for free and decided to give parallels a shot. A little after installing parallels and giving my windows key, I decided I would rather do boot camp and "upgrade" the partition to run in parallels if i needed to. I started the boot camp installation but when it got to asking me for the Windows 7 key, it said the key was invalid now. Is there any way of getting the key back?