K-Lite Codec Pack is a collection of codecs and related tools. Codecs are required to encode and/or decode (play) audio and video. 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 99% of all the movies that you download from the internet. The K-Lite Codec Pack works on Windows 2000/XP/2003/XP64/Vista.