So, I start up my Halo 4, and it stops instantly at the loading introduction screen. All I see is the "4" logo. I can press the dashboard button, but if I do anything on it, it'll crash and I have to restart my Xbox. Sometimes it'll sign me out, while still trying to load, as well. I got it to start up this morning, and it said my HDD was too close to being full to save on it. So, I erased some junk and tried starting up. It only does it on this game (that I know of), and my disc is in near perfect condition. I have an original 20GB white 360. Please help? Thanks..!