I don't know what happen. But There no sound and no mixer what so ever. I have a Compaq. I really need help.
try these: start > Run > at the search box type services.msc. at the services window,scroll down to Windows Audio. click once & at the upper left portion,you will see: Stop the service Restart the service click Restart the service,when done close the services window & try the sound. if still no sound,double click the "Windows Audio" (Services) click the Stop button,at the startup type box,select "Automatic" then click start button.click OK,close the services window & try the sound.