Try this Microsoft audio fix-it to fix this issue.
Ensure that the correct playback device is selected in Sound Properties as shown in the image. To access Sound Properties, type Sound in the Start Search box.
Hope this helps.
Thanks and Regards,
The sound is not totally gone. I hear it when the system starts or shuts down. However, all the other sound is gone. It is not on mute, the sound is at its highest. What can I do?
Fredric M. London