Am about to upgrade my computer with new motherboard and CPU. I am already running Windows 7 on my current system. Is there a way to preserve my license key or am I going to have a problem upon reactivation? Obviously I need to do a fresh install to get all the new drivers and such. Just wondering what pain I am in for with Windows 7 activation. I know there was a tool out there for Vista to backup license key, but could not find one for W7. Does one exist?