Yo, I'm getting exactly the same problem.. the whole computer freezes and the only way is to restart.
I have a brand new comp with quad core, nvidia gtx 260 and 4 gig of ram so I know my computer is wayyyyyyy above the requirements..
So it's the game that is bugged? Let's hope they can fix it pretty soon.. Releasing a game that crashes on people's computers for no apparent reason is pretty embarassing on EA's part.