On my last Mac, I got a copy of Windows 7 and installed it with Bootcamp. I later removed that partition. If I remember right, I did it with Bootcamp assistant. I no longer have that computer and I'm going to be buying a MacBook Air soon. I want to re-install Windows on the new computer, but I'm not sure if my license is "used up" from that last computer. I also don't know if there was a way I could've removed my license from the last computer's Windows 7 before reformatting. I did no preparation whatsoever for the reformat, I just went to Bootcamp Assistant and clicked whatever the erase option was. Anyone knowledgable with this? Is my Windows 7 disc now useless?