Frustration (Score 1)

I could live without the physics engine that people are talking about if my game would just run smoothly! I purchased the game for my 360 and everything ran fine...until I updated my firmware and now the game locks up like every 5 minutes for about a minute and it really kills the gameplay for me. I haven't tried another game yet to see if it is my 360 or just obilivion that is having the problem but it has become so difficult to play! But when it does lock up, my entire 360 stops responding to me.