I just upgraded my video drivers because Steam asked me to. Who knows why; I should know not to listen to that piece of crap software by now. Anyway COD4 (only COD4 nothing else) is now extremely slow, like I'm running about 10, maybe 15 FPS. I updated PB but that didn't help. I also read that deleting your player profile and starting again can help, but I'd really rather not do this, as I've got a whole year of gaming on there, with all the achievments and a good kill ratio. Surely there must be a way to change the profile in an editor rather than regenerating it? Or maybe it's not the profile at all? Anyone experienced anything similar?