Mkv files played very slow in Windows7, P-IV 3ghz, D915GVWB , 1.5GB RAM, I tried in Windows Media Player, GomsPlayer, VLC Player, Nero Video Player. same result in all players.

A lot of media players can play MKV files on your computer. If you're looking for a free program, just give Leawo Media Player a try. Besides playing MKV and other media file formats, the tool is also a good Blu-ray/DVD player for your computer.

6 Best Free MKV Players for Windows to Play MKV Files on PC for Free

You may follow this method to solve "Roku doesn't play MKV" issues at
Roku MKV Easy Solve Can Play MKV on Roku 3 2 via USB Interface

You can install Leawo Free MP4 Converter, when you install it, it will ask you to install a codec package, after you finish it. you can convert your video to MP4 format easily, or just watch your MKV video with Windows Media Player.

Hi,
If you are having trouble playing MKV files, may I suggest downloading VLC and using that to play all your media files?

http://www.videolan.org/vlc/download-windows.html

Zahc

Here's a link for CCCP, it's a codec pack which should take care of all your needs, I did a quick search to make sure it's still clean of viruses/spyware and it seems it is

CCCP

you may still need haali media splitter to play .mkv files in media player so here's a link and the link to the .mkv site:

Haali - direct download
.mkv site - main site for the matroska format (.mkv)


if all else fails use vlc, it plays anything, if it doesn't play in that then it won't play in anything

http://www.videolan.org/vlc/download-windows.html

I used to use all of these when I used windows and still use vlc now.

To play .mkv file. Use gom or vlc player with klite codec installed

Mkv files to play correctly require quite powerful computer. Try mpg, MPEG codes but even those when used for high definition video my require some processing power.

The player does not support .MKV files if you update the player it will still not play .MKV files the update is just to fix problems with the player.