Select View \ Show hidden devices from the menu.
Change the sound drop-down on the bottom to “None” and then click Apply.
This should deactivate the volume control beep.
Turn Off the Annoying Windows XP System Beeps
When you spend a lot of time in front of your computer, the annoying beeps start to drive you mad after a while. I really don't need to be told that I hit the wrong key anymore, so I've compiled a list of how to turn off all the system beeps in Windows XP.
