I am having the same problems. Windows XP, Intel Core2 Duo, GeForce 8800 GT
Its a particularly nasty crash because when it freezes I cant End Task my game - I tried ALT TAB, CTRL + ALT + DEL, Windows Key ... nothing lets me terminate the game gracefully. I have to do a hard reset on my machine which I loathe to do.
Anyone know of any tricks to kill the game when it freezes w/out hard reset? When you cant open the task manager? Maybe I can setup some hotkey to find and kill the process for me...