Hi there, I'm upgrading my PC in a few days and just wanted to be prepared when it happens. I'm replacing the mobo, RAM, GPU, PSU and CPU. My Windows installation is a student Windows 7 64bit upgrade, upgraded from a Vista 32bit OEM. First question: I'm going to try using sysprep to strip my installation of old drivers and hopefully successfully replace them with new drivers. Should this work? Second question: Will this upgrade invalidate my Windows license? And if so, will my PC be unusable? Third question: If it's invalidated, how do I reactivate it? Can I re-enter the license or will I have to reinstall? If I reinstall, would the 7 Upgrade activate, as well as the Vista OEM? Basically, the best case scenario would be that I won't have to reinstall Windows for the time being, and can do it at my leisure. Thanks in advance!