1/  Download and install Media Jukebox.

2/  Once it is installed, click on "Options" under the "Settings" heading in the toolbar.  Then, in the window that opens, scroll down on the left side and select "File Associations".

3/  The window that opens lists all of the file types that are compatible with the Media Jukebox.   Scroll down and check the box next to "wmv", Windows Media File.

4/  Good.  That should work.