i recently installed the RC of windows 7 ultimate. the version is like 7600 er sumthin i dunno. im pretty computer savvy but everytime i generate a key from microsoft it says it is an invalid key and refuses to activate. any help with this would be great. also, i installed the rc about a month after the downloads stopped, so i dont know if that would have caused the issue...and i installed the it via an iso image mounted onto a virtual drive, so it dont know if that would have also contributed to this.

Hello customer, Before going any further, please be assured which version of Windows 7 you've installed on the computer, Release Candidate (version number: 7100) or RTM (version number: 7600). If it is the RC version, you might go to the following hyperlink to reapply a new product key. Need to register or find your product key? Start here http://www.microsoft.com/windows/windows-7/get/download.aspx Otherwise, for the RTM product, you should contact your local Microsoft Customer Service directly for more details Good luck! Andy