Many of you have attended our live TechNet events around the country and received the Windows Vista Ultimate SP1 Promotional Kit. Inside the cover is a PIN number that has to be registered at www.registerwindowsvistasp1.com. many of you have been getting an error saying the PIN had expired.
If you are getting this you have two choices, either delete the cookie for that website, or register from another computer.
Let me know if that doesn't fix your problem.