Originally Posted by The Archangel
Its because maybe your WMP dont have the codecs to play MKV files so search for codecs![]()
Or if you considered and want to download a new player i recommend VLC media playerits a good player with support for Matroska, and support for most video and audio streams you will find in an MKV file. This means that you most likely will not have to install any extra codecs or filters, depending on what your streams are.
http://www.videolan.org/vlc/ you can download it here>if you dont want to download codecs![]()