After weeks of tweaking and using all the information I could find on this forum and the internet I finally found the one to finish my performance tweaks.
Find the Intel Rapid Storage Technology Icon in START. Open it up and go to the Performance tab and set Link Power Management to disable. You must restart your machine for it to take effect.
I had tried all other performance/stuttering tweaks with minimal results, and after doing this my stutters are finally gone.
Thanks to this community who has posted all their fixes.
Here is the Best tweaking guide ever for COD. Even if not overclocking (I'm not), the settings in this guide let me fly stutter free on the highest in game settings! Give it a try, you won't be sorry.
http://ultimatewindows7gamingoptimization.blogspot.com/
I have turned antialiasing completely off using SMAA and even using performance setting in NVCP. It looks beautiful and runs smooth as glass.