Well, it took a while, but I finally have my Halo: PC nameplate! My situation was that the site said my key was in use, even though I still had my game and everything that came with it. If you are having the same issue, here's how I got it solved: [u][b]What you'll need first:[/u][/b] -Your original Halo: PC CD -Your original CD key -The manual that came with your CD -The box your CD came in. The box has the Microsoft Certificate of Authenticity for your game on it, so this is very important. You will need the box, the key and the original CD for sure. I was told to get my manual, but personally wasn't asked for any info from it. [u][b]What you should do:[/u][/b] Don't bother Bungie too much with emails or PMs. Customer support got back to me and told me "Microsoft is where the codes come from so Bungie doesn't have much control over them" and linked me to [url=http://support.microsoft.com/kb/811224]here[/url]. Call Microsoft Support. I suggest just Googling the phone number, since Microsoft's support site is almost impossible to navigate. Say "technical support" when prompted by the automated voice. It should then ask you what you need help with. When it does, just say "I don't know", since it doesn't understand what you are trying to say if you say "Halo PC". Past that, just calmly explain what your issue is in detail. Be patient, you will probably be redirected once or twice. I got directed to the Piracy Hotline and was then redirected back to regular Customer Support before I got somebody who could help me. They asked for info from my CD and box, and asked for my old key. After 2 minutes on hold the guy came back and gave me a brand new Halo PC key! I hope this helps some people who are having trouble registering their key, I pretty much gave up until Bungie Customer Support pointed me to Microsoft.