a friend of mine has recently upgraded my computer to windows 7 ultimate but had never activated it.. I asked for a site/product key but everyone they gave me did not work how am I supposed to get my windows 7 back..??? i need a key

Hi, If you got a invalid error, please refer to the following link: Windows 7 activation error: invalid product key Or, you need get a new Windows 7 product key. Hope it helps. Alex ZhaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.