Getting my WDTV MEDIA PLAYER TO PLAY MY WMV AND OTHER MOVIES

HELLO WD COMMUNITY, WHEN I FIRST GOT MY MEDIA PLAYER IT DIDN'T PLAY ALL OF THE MOVIES I HAD SO I DOWNLOADED THE FIRMWARE AS WELL AS THE SOFTWARE. WHEN I CONNECTED IT BACK TO THE T.V. IT PLAYED SOME OF THE MOVIES IT DID NOT PLAY BEFORE AND IT ALSO STOP PLAYING A LOT OF THE MOVIES IT ALREADY HAD. I HAVE NOT LOVCATED THE ARCSOFT MEDIA CONVERTER. WHAT I'M ASKING THE COMMUNITY IS THERE ANY OTHER WAY TO GET THESE MOVIES TO PLAY WITHOUT HAVING TO CONVERT THEM TO A SUPPORTED FORMAT?