click here is good. (scroll to the bottom and select Basic Download which is the free version.
It plays almost every format going, both audio and video.
I use it quite a lot. Have just checked and it will play .wmv files.
Once you have installed it you need to go into Preference, File Type Association. In the right hand window select Check All, then Update and OK twice. It should now be configured to play almost anything. Never let me down yet.