Windows shouldn't be asking for your activation code when you visit a website.
If you can visit other sites without being prompted for your code, it's probably malware.
It came up so fast and it looked like the official site for Microsoft. Guess it really threw me. I finally just shut my computer down and went on it again this morning. Same think happened when I went on Myheritage.com. It completely closed it down on IE. I use Firefox most of the time but just happened to use IE this morning. I was on Firefox last night when it happend for the first time.