I recently downloaded a video file from the net but was unable to play it inWindows mediaplayer. Wndows Mediaplayer displayed an error that some codec was missing.. While searching for that codec I found this K-Lite Mega Codec Pack which has whole lot of codecs and that to for free. It has a Classic Media Player which is lite and nothing like the bloated Windows Mediaplayer. Thanks to K-Lite Codec Pack, I was ableto watch the movie file.