There Shark007 has said it. I'd recommend you to use only the windows components with the latest version of ATI drivers
. Nothing more is needed. Uninstall the codec pack you just installed. Your directx seems normal.
Optional: Try using a registry cleaner like CCleaner after the uninstall. It will remove all the traces which may be left after the uninstall in the registry and helps improve your windows performance.
If you wish to play files that do not play in the windows media player use other popular free third party players. VLC media player is by far the most efficient and light for the PC. This comes with a preloaded pack of codecs which can play almost any format of audio or video.