Windows media player won't show video

>I got my computer a little over a year ago (when I had windows media player
> 10). I have never been able to play dvd's through the windows media
> player
> and the dvd player that came on the computer is terrible (my computer is
> an
> acer and the media player that came with it is called arcade). I put
> windows
> media player 11 on the computer, but it still maintains a black screen
> while
> playing the audio part of the dvd. I have tried reinstalling the program
> and
> have paid to download extra video plugins (InterWin DVD&MP3 pack) desigend
> to
> be used with the player. But non of these things have solved the problem.
> I
> cannot seem to find any settings that turn off the video and this problem
> is
> not address in the FAQ on the web site. If anyone has any idea what else
> I
> can try please help me.