Hi tarditim,
Even with the Product Activation window, you should still be able to see your start button and menu bar. Can you launch an Internet Browser?
If so, please follow the below steps:
1) Type: http://go.microsoft.com/fwlink/?linkid=52012 into the browser address bar.
2) A window will come up asking if you want to Run or Save, Select Run
3) When the program runs, Click the Continue button, then click the Copy button.
4) Return to this thread by Typing: http://forums.microsoft.com/Genuine/ShowPost.aspx?PostID=2567651&SiteID=25 into the browser address bar.
5) In a reply post, Paste the Diagnostic Report.
Thank you,
Darin Smith
WGA Forum Manager