So, for some reason, I didn't even think it would be a problem using my Windows 7 disc - the one I used on my PC at work. I didn't think i would have a problem using the same disk, but i believe I only have 30 days to use a product key! ahh, i already installed software and loaded drivers. What happens after 30 days? Also, can I just buy a product key and not have to reformat?