Quote Originally Posted by bhxtyrant
I have even tryed right clicking the files in question and selecting to "open with" option and choosing "always open with" windows media player.yet they still do not work.
Try another method:

Control Panel > Add or Remove Programs. In the left hand menu click the "Set Program Access and Defaults" button.

In the Choose a configuration panel click the arrow to the right of Custom.
In "Choose a default media player" put a check next to Windows Media Player and then click OK.