In Windows XP
On the Start menu:
add/remove programs applet in the control panel !
Right click on desktop, select properties, go to screensaver, and there you will find the password option.
Personalize
The System applet in the control panel will allow you to join a system to a domain.
add/remove programs
System
The PC Card icon in Control Panel
Install program
The Action Center
There is nothing called DOS applet..
Add/Remove hardware icon in the control panel.
Generally audio and speaker configuration is achieved through the Windows control panel applet, either the vanilla Windows applet or by an applet installed with the audio hardware. The game itself may also have configuration settings within the game options. Knowing which game, your particular audio hardware, and Windows version may elicit a better response.