Be sure to come after you download movies or video clips from the Internet , Player of the system was not able to play a clip or broadcast is incomplete (eg voice, video clip playback, but it not shown), 

this problem is not to install the appropriate Codec for playback video clips on Windows you are.
But what Codec? Codec word means COmpressor / DECompressor (compression / opening the compression): that is a routine software for storage of the raw video compress and then unzipping it to run on its computers.
K-Lite Codec Pack is a collection of Codec required to play audio and video formats, so that the installation can set many audio and video clips (WMA, AAC AC3, M4A, MP2, OGG, DivX, AVI, WMV, RM, MOV, MP4) in order to run the (play) here. This is set during installation, you can also install a Media Player Classic instead of the Player of the system of the Player to play your audio and video files. K-Lite Codec Pack you install in Windows , you can use programs like JetAudio and Windows Media Player to play all formats available in this mode to play RM files and RAM do not need to install RealPlayer or for play You do not need to install Quick Time MOV files. For SVCD and DVD player like PowerDVD you do not need to install plug-ins or applications and ...

A key feature of the software K-Lite Codec Packs:
- The ability to play 99% of audio and video formats
- Codec-to-date information
- Compact and lightweight Player
- Display subtitle
- And ...