K-Lite Codec Pack is a collection of codecs and related tools. The K-Lite Codec Pack is designed as a user-friendly solution for playing all your movie files. With the K-Lite Codec Pack you should be able to play all the popular movie formats and even some rare formats. This package is mainly for power users and people who do their own encodings.
The K-Lite Mega Codec Pack works only on Windows 2000/XP/2003/Vista.