Well, I hadn't played for a while. The other day I started up my 360, and I can get on Live no problem on the dashboard, download demos, play other 360 games. However, when I'm in Halo2 it doesn't let me connect and prompts me to start the troubleshooter. Doing this just confirms on the 360 side that I can connect fine, going back to Halo2 produces the same error, in this circular fashion.
I've never even opened up my 360, let alone flashed it with anything. So this isn't any kind of ban or anything.
Anyone have any idea what's going on?