wonder what will happen? i just did a clean install of win7 also with certificate and key also on my laptop and i'm loving it so far. hopefully this goes on till the next win release. i have vista 64 system (legit ) and im contemplating of upgrading it with the copy i used with my laptop. question is, is this possible? what outcome will i expect? any suggestions as to how i go about installing win7 on my vista unit?