From Codec Guide:
K-Lite Codec Pack Full is a collection of VFW or ACM codecs, DirectShow filters and tools. Codecs and DirectShow filters are needed for encoding and decoding (playing) audio and video formats. 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 audio and video formats and even several less common formats.
What's new in this version:
- Updated MPC-HC to version 220.127.116.11
- Updated Codec Tweak Tool to version 5.9.9
- The 32-bit and 64-bit versions of LAV Filters now share their settings.
- Added option to only install 64-bit codecs. Visible only in Expert install mode.