Team Fortress 2 Closing Itself in-game with NO error.

[AceDread]

See title. There's no error code. A few days ago It closed with an error about some dirext x 8 mesh thing. I forget the code, but that has happened before. I couldn't find any information on Google with what I had. Maybe someone here can shed some light on this?

[BuLLet]

My TF2 does that too, even in-game when im shooting stuff it just closes.. But i love the useless updates, didn't see any of my problems fixed.

[Fried Tofu With All the Frills]

Are you using Directx 8? If you aren't you might want to try switching to it.