I had k-lite codec pack before,but when I went to play F-Zero it was choppy.So I unintsalled it and got ffdshow,best thing I done.It played fine after,Also,the free divx codec pack fron www.divx.com comes with spyware.

http://www.divx.com/divx/pro/whyads.php

I would unintsall it immediatly and install ffdshow.