BEEN TRYING TO WATCH THE SEASON FINALE FOR THE OC...BUT I KEEP GETTING THIS POPUP MESSAGE SAYING WINDOWS MEDIA PLAYER CANNOT PLAY THE FILE. THE PLAYER MIGHT NOT SUPPORT THE FILE TYPE OR MIGHT NOT SUPPORT THE CODEC THAT WAS USED TO COMPRESS THE FILE.
WHAT TO DO? CAN I CHANGE THE PROGRAM AUTOMATICALLY USED TO PLAY LIMEWIRE DOWNLOADS?

You shouldn't be asking that question here my friend.
Try asking again maybe leaving some bits out and telling us what the file extention is