Originally Posted by ViN86
My suggestion is to stop using Windows Media Player.
Use VLC Media Player. Open source, has all the codes, and is all around better.
It's not that good, it is in the sense that relies on libavcodec (a.k.a. FFMPEG) and the support is quite good for third-party formats, but try to play any Windows Media based content and you'll see why it isn't that good, even if you configure it to use system libraries as prefered method...
Instead, I'd go with CoreAVC for H.264 content, AC3Filter for audio decoding and avoid any codec pack (specially CCCP, which messes every single codec installation out there, no matter what system you put it in).