I just got my Xbox two weeks ago, but yesterday, the disks would not work when I was signed into my Xbox Live account. I tried using a non-Xbox Live account and they worked just fine. This is really frustrating to me since I just got the console and was looking forward to playing on it. There is literally no way I could've broken the console b/c I set it up immediately and haven't moved it since then. If anyone has had the same problem and fixed it please let me know.