I put a new motherboard with faster processor using same HD with Win 7 on. Win 7 did not boot up, no problem as I figured the drivers from the old board didn't work with the new, so I reinstalled Win 7 again and no problem until it went to validate the license and it says my license is invalid now. Does anyone know what's up. You can't believe how pissed I am and ready to go back to XP. Oh, also forgot to mention I called the windows support that the pop up said to use. After waiting 45 minutes I got a real person and told him the problem, he put me on hold for another 5 minutes then came back and said that I have to go through the windows licensing group. I asked him if I will get a real person and he said yes. I got connected and it was a computer generated message and asked if I had Windows XP!, I said no, then it asked if I had some kind of servers and other hardware I never heard of, no Windows 7 ever came up so I just hung up, what a bunch of slim bags and I paid $150 for Windows 7 home premium and can't even install it on one computer.