My computer runs Vista. Recently, I've had some audio problems. I seem unable to play audio from movie files (and the video files run perfectly, fyi). The problem is that the computer plays other audio (the normal clangs and bleeps of Vista and youtube videos are delivered with perfect audio). I think, therefore, that this is not an sound card issue but some other kind of issue. I thought it was a codec issue, but I uninstalled my codec pack (K-lite codec pack standard) and reinstalled it and audio continued to not play. Audio also did not play before I reinstalled the codecs. I don't know if this will be of any help, but I downloaded Skype the other day for a video chat and the audio also did not work for Skype. Any help? Thanks.