I have had the game freeze twice in the same place and I have had to kill the game using the Task Manager. It is the only place where I have had a crash in my adventures in Skyrim.

I have revisited Helgin (I was in the area) and I am leaving the town by the entrance you come in through during the starting scene, I take the right hand fork and head towards the tower that can be seen on the radar. Just down the road the game freezes completely. At least on my game this is repeatable, it has happened twice.