Just a week or two ago my motherboard got fried in my pre-built desktop that came with windows xp loaded on it. It had a 250gb sata 5200rpm hard drive in it and I wanted to take this out and put it in my new build so that I could save some money. I ordered windows 7 on a disc to go with my new build. I planned on trying to remove windows xp before I even got the new computer, so I hooked it up to another computer of mine and came across the problem that I need to register my xp with the computer I was trying to clean up the hard drive with(I know I'm a computer newbie). If I put this hard drive into the new computer with the xp still loaded on, is there anyway that I can get the computer to delete the xp and load windows 7 off of the disc without ever having a conflict between the two operating systems?