This policy setting allows you to remove the volume control icon from the system control area.If you enable this policy setting the volume control icon is not displayed in the system notification area.If you disable or do not configure this policy setting the volume control icon is displayed in the system notification area.
Policy path:
Start Menu and Taskbar
Scope:
User
Supported on:
At least Windows Vista
Registry settings:
HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer!HideSCAVolume
Filename:
Taskbar.admx