I have recently bought a copy of Windows 7 Pro x64 for my computer. We have three computers at our house, so I got my version; my father has Windows XP x86 Starter Edition; and my brother doesn't have his own copy, yet. He has to install Win7 each month and I am very curious if he can genuinly use my Win7 Pro key?! I think that it was in the Basic/Starter Edition where you can use the same copy for about three times. Can it be done with mine? Or does he has to buy his own copy?