Hello,
It appears that to resolve your issue, you must Activate Windows using the "Activate by Phone" method. Please follow the below option that that best fix your given issue scenario:
a) If you have access to the Start button: Click the Start button, and type in "slui.exe 4" in the search field and then press the "Enter" key. This will bring up the Activate by Phone dialog window. Follow the steps provided by the window. The phone activation process should only take about 6 minutes.
b) If you do not have access to the Start button: Reboot and login to Vista, a dialog window will come up. In that window, click the option "Access computer with redused functality". Once you do that, Internet Explorer or Firefox browser will open. In the address bar type "c:\windows\system32\slui.exe" press enter and follow steps to Activate over the Phone.
Thank you,
Darin Smith
WGA Forum Manager