posted on Jan, 11 2012 @ 01:51 AM
Hes not having problems PLAYING the file, just opening it.
Right click on the mkv file, select "Open With" and then select "Choose default program..." - this should bring up a selection of applications to
open it with. Select Windows Media Player.
It seems that some other application has taken over the mkv association.
You dont need to install klm or vlc, unless you want an entirely different player (vlc) and codecs that from what you said, you dont need.
If you can open the MKV files manually from inside WMP then you have the codecs required to play it.
edit> as to the no authority, thats something I've never heard of. Right clicking should give you options to play, add to playlist etc, cut copy
delete etc, and one option "Open with."
If you've lost all association with the mkv file by uninstalling codecs, reassociating it with wmp should work.
edit on 11-1-2012 by mainidh because: (no reason given)