so i installed 7 and it works great but then i went to start vista (ultimate X64) and got a message saying that this copy of vista is not genuine, and that i have to re-activate it. for months i have been running it without any problems, and it always said it was genuine. what gives. i mostly use XP (Pro X32) for computing, and Linux (X64) for certain other things. Vista was there for gaming, because i got 8gig's of ram, and a 9800GTX, so i wanted to have DX10. stuff like this is the reason i have Linux on my machine.*i should also mention that this is a corporate license, the key is built in, and you should not have to put one in (and yes its on a personal computer, i'm just borrowing it ;) from the office)*

Reactivating Vista should be as easy as just reentering the25 character code on the yellow sticker that camein the case ofyour copy of Vista.

tried that it says that there was an error while verifying, and that i need to contact windows.

Hello, this is a Vista activation issue and you should directly contact Microsoft Activation Center to solve your problem. For your convenience, please refer to the webpage below. Microsoft Activation Centers Worldwide Telephone Numbers