I have a license of Win 7 Pro, that's always been used for a VM of my work environment. This license has never been installed on anything other than a VM. Today, I did a reinstall, and the automatic activation didn't work. I needed to call in and do phone activation. It worked fine, but what caused this to happen? It's been almost a year since the last install, and the keys never been used for anything else. Also the base computer hasn't changed... except for a new SSD. Would that small change cause this?