please help as i aint got a clue when it comes to pc stuff. i am tryin to watch a movie file but even though the picture quality is top class,there is no audio.i play my files through real player and when i try and play the file,it says some portions of the file cannot be played and would you like to see if there is an update for this file.when i click yes it says it does not recognise the codec and when i click on no it plays the file but with

no volume.please help