WHAT SHOULD I DO?PLEASE HELP 
play it with vlc media player
http://www.videolan.org
if you absolutely want to play it in windows media player, install ffdshow-tryouts (but that doesn’t work 100% of the time. neither does videolan, but it’s less likely to fail)
download vlc media player it has alot of codecs and its good easy software if that dont work redownload the torrent
You should be cufarel when downloading codec especially when you get the movie from torrent. They might be downloading virus instead.anyway WMP sux.Try another media player like VLC. I have never need to download codec when using VLC
help me
Hey guys..... i downloaded a torrent file, it says i need the WMP codec, but when i play it with WMP it redirects me to a site.... it is fully downloaded and i need to know if i must delete it... when i play it with VLC it says i must play with windows..... Please help