skyrim shadows stuttering?

Hey my question is about skyrim for the pc. I'm having issues with shadows. the game works fine if i put it in the lowest resolution it doesn't lag or anything. the only problem is no matter what resolution or settings i use the shadows jump and skip and flash all over the screen. I looked up the problem on youtube and all i found were people having the jump but not so severe and there was a pattern to it. it was barely noticeable. this makes it hard to play the game because in my case the jumping is so distracting. I'm using windows on boot camp. does anyone know how to solve this problem?