I don't understand the problem. Right after installing COD on my new Win 8 computer I ran the Win 8 "fix" posted here by sYkO and the game has run rock solid for me ever since. The procedure is really easy to apply but you must follow the simple readme instructions for using the "fix".
http://forum.1cpublishing.eu/showthread.php?t=36078
The file you want is the zip attached just below the poster's signiture