If I am using Media Center, Windows Media player, or DivX player, my sound stops @30 seconds into various .mkv file I endeavor to play. The files play very well using WinTV 7 app by means of the purpose of arrived by means of the tuner (Hauppauge 2250). MKV is the simply format I am accepting tribulations by means of; the total additional (so far) are very well. Several ideas would be to a great magnitude appreciated! using DivX 7 codecs for the total my computers.