It seems like you are facing an issue with Windows Media Center Live TV, specifically with the sound after initially exiting and trying to restart it. Since you've already tried updating drivers, reinstalling WMC, and testing control panel sound options, here are a few additional steps you can take to troubleshoot this problem:
Troubleshooting Steps for Sound Issue in Windows Media Center Live TV:
- Check Sound Settings:
- Ensure that the correct audio output device is selected within Windows Media Center settings.
[]Restart Windows Audio Service:
- Sometimes restarting the Windows Audio service can resolve sound issues. You can do this by: