[crazy7605150]

well i have two computers. one i bought from a friend that had xp and a new computer that came with vista. well i wanted to install vista on the older computer with what i thought was a vista install disk but it was the upgrade disk. well the computer eventually locked up and i was only able to use the internet to "buy a product key". well then when i boot up the computer it would show the boot diagnostics and freeze. so i tried to reinstall xp back onto it, it then said that it couldnt create a partion. so i put it in my other computer and formated it. then i plug back in and now it wont show up on the boot menu. also now my master dvd Rom wont power up at all and my xp install disk is in it....... what do i do??? i have been trying for weeks .. im completely lost and help would be appreciated