Like the topic title says, in 2009 had upgraded from Vista to Windows 7. This weekend my hard disk crashed after about 6 years of good service. While I downloaded the upgrade, also got a backup disk sent that allowed me to do a full install of Windows 7. So, after installing a new hard disk, went to install Windows 7 from the disk, and got an invalid product key message when trying to enter my product key. Primarily, I'm presuming this is b/c the current product key was tied to the old hard disk drive, which I wasn't able to backup or image. So how do I get a replacement product key for my old one?