erm .. I do know there are some spyware out there that ask you to download specific codecs which are really viruses. Do not trust them. If VLC - (click on link) cannot play them, then do not trust them. Not all files that have mp3 or wma are really audio files. They are really 'other' things. They are secretly hidden viruses. This is especially the case for drm encoded files which can literally be anything, viruses or worse.