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Possible Duplicate:
For which codecs/containers does Windows Media Player now have inbuilt support with Windows 8?
Do I still need to download and install something like K-Lite with Windows 8, or have they bundled codecs in to play the myriad of media types on the web? (.mkv, xvid, h264, etc.)
1.mkv is not a codec, it's a container. – akira – 2012-11-02T09:10:02.087