In the middle of playing halo 1, I noticed mid-game that it was no longer setting checkpoints after about 6 levels of doing so. Needless to say, it was a little hard to progress. I noticed the same thing when trying Halo 2..., no checkpoints. Today I booted Halo 1, and my entire profile is GONE. WHat the hell is goin on here? Is it because of the evox trainers? If so, why would problems come out of the middle of nowhere?