Both games work 100% fine on my computer; the only time they crash on me is if my harddrive is in use (yeah, seriously!) and I lag due to that.
Edit: I'm using 4.0-1003; so if it's newer than that, and there's a crash, maybe it's not this. But you didn't list a build here, so, meh, guessing it's that problem.
Edit: I'm using 4.0-1003; so if it's newer than that, and there's a crash, maybe it's not this. But you didn't list a build here, so, meh, guessing it's that problem.