I HAVE RUN INTO THIS PROBLEM SEVERAL TIMES, BUT HAVE NOT BEEN ABLE TO FIX IT W/O HAVING TO DELTREE & REINSTALL WINDOWS. THE SOUND WILL SHOW UP IN THE DEVICE MANAGER AS FUNCTIONING, BUT WILL NOT SHOW UP UNDER THE MULTIMEDIA SECTION OF THE CONTROL PANEL–ALL THE OPTIONS ARE GREYED OUT AND NO SOUND CAN BE HEARD. IT HAS HAPPENED WITH ONBOARD VIA, SIS, & INTEL CHIPSET MOTHERBOARDS. HOW CAN I CORRECT THIS?? IT HAS TO BE A REGISTRY SETTING. PLEEZ HELP!!