My workstation operating system (OS) is Windows Server 2008, for a number of reasons, but mostly so I can better describe what settings need to be set where. Everyone once in a while my audio has quite working. Actually on any server os my audio quits a lot. It usually comes back when I reboot but I don’t reboot but every 15 to 30 days. I have a bazillion things open and rebooting is always a pain in the butt.
Start > Administrative Tools > Services > Restart “Windows Audio”
or if it happens enough make a batch file:
net stop "Windows Audio"
net start "Windows Audio"