I've come across a strange issue and can't seem to fix it myself or find an answer online.
I have an HP tower running Windows 7. Absolutely every sound works on it except for when a DVD is inserted and played, then only the DVD has no sound at all. It doesn't matter which player I use (I've tried regular Windows Media Player, VLC, Quicktime, etc), there is no sound. All internet sounds work, iTunes plays back music and video such as movie previews, though interestingly playing music files through Quicktime, VLC, or Windows Media Player doesn't work either.
I've been through the speaker audio properties multiple times. All other audio devices (there is only one, a RealTek audio device) are disabled, though I tried with them enabled, too. I've reinstalled the driver after uninstalling and deleting all residual driver files from the HP website. I've tried VLC settings, uninstalling programs, virus scans, etc. The only thing I haven't tried is a fresh install and I would like to avoid that if possible.
So, is there anything else I can try? I am all out of ideas.