Hiya
You can try to download and install the Microsoft Windows Media Player Codecs Pack....
But, they are not really very good...
(Open the floodgates of arguments... )
Anyway...
First try this...
Down in my sig you will see
Cole2k Codecs
Click on that link and download ONLY the Cole2k version 6.0.9
Standard pack.
Download it and
SAVE it to any folder that you like in your Documents... Not to your Desktop !!!
After you have successfully downloaded it... Run it by double-clicking on the file...
BE SURE to select EASY install... NOT Advanced...
After you have finished the install, you should Shut Down your computer.
After you Start Up again, all... I mean ALL stuff should play... movies and music.
It's free.