I got this page from Google search and surprised myself by following your directions and curing this most irritating pop-up message. It all started when I installed the latest Microsoft update: Cmedia WDM Audio Driver which gave me no sound at all after I rebooted. I tried to deinstall it and then went back to my origional Avance AC97 Audio Device. After the sound returned, all I had to do was remove the cmaudio string as you instructed. All is well and my wife thanks you as she doesn't have to listen to my ranting!