For some reason, I cannot install Windows 7 onto this new gateway PC that I have, but am able to do it on my older PC. Both are capable of running 64 bit, both have new and working memory, hardware. Now I understand that when you do install windows for the first time, your hard drive "marries" your motherboard. Thus when I put the hard drive into the new machine after a fresh install, it gets stuck on "windows is starting" and refuses to boot (ClassPNP.SYS in safe mode). So is what I am trying to do possible? If so, how do I do it?