No sound in Windows Media Player
If only some of the movies you're playing do not get sound, it's likely you have a codec issue. Codecs allow movie files to be smaller, but in order for them to be played in the media player, it must also have the codec installed. Essentially, they both need to speak the same "language."
If the location of where you downloaded the file does not contain a link to download the codec as well, we suggest you view our codec dictionary definition for additional options.
Check volume settings
Often, no sound in the Microsoft Windows Media Player may be corrected by adjusting the volume controls at the bottom of the window. Moving the slider from the left to the right will turn up the volume; if all the way to the left the volume is zero.
Make sure not muted
In addition to the volume slider, make sure the sound icon is not pressed in as this button mutes the sound.
Make sure the Equalizer is balanced
If the equalizer is all turned down you may experience sound related issues. To check this setting, click View, Enhancements, Graphic Equalizer. Once the Graphic Equalizer is displayed, make sure all settings are at least half way up.
Verify your sound settings are correct. When other software programs are installed, it's possible for them to incorrectly adjust your sound settings causing issues with your sound.
Update or Reinstall the Windows Media Player
If you continue to experience issues, you may want to consider reinstalling or updating the Windows Media player on your computer.