Some more info;

My game just crashed again (tried everything mentioned in this thread, without any luck). But I just noticed something weird, right before my game crashed, I saw a yellow/orange particle thingy showing up (flickering) that wasn't supposed to be there. Also, I'm using Dxtory to cap the framerate to 45 (yes without this program the game still crashes), right before the game crashed my framerate spiked and immediately went back to 45.

Also played the game yesterday for a few hours and it didn't crash at all. It's hard to really tell what the problem is if it happens so randomly.

There has to be a conflict with the engine and the NVidia drivers for some strange reason.