So I got and installed a larger hard drive on my xbox 360 specifically so I could play halo 4. My xbox has rarely ever frozen before, but when I installed the hd it was freezing on the desktop and games. I couldnt do anything in under 20 min. I had a friend who fixes xboxs look at it and he took it out, put it back in, and it worked better, but now it wont play halo 4 whatsoever. It works fine on my other games, and still freezes a little. Do I need to format it or something? Iv tried formating.