I have several players on my pc (real player, windows media player, cinema player) and I've been enjoing watching movies in different file formats. Recently I have sent a copy of my fav movie to a friend of mine in Australia. She couldn't open the file so I recommended one of the players (WMP) for download. Still no clips are to be seen on her pc. Does she need a set of codecs too? Would it be enough? What is needed to play some movies on a PC? All progrms on mine were preinstalled for me by a geek friend. Any help?