Most speakers have a volume control, but you can also control the overall level of sound on your computer using Windows. Here's how:
Click the Start button, and then click Control Panel.
In Control Panel, make sure you are in Classic View, with all Control Panel icons showing. If not, click Switch to Classic View in the left pane of Control Panel.
Click Sound and Audio Devices to open the Sound and Audio Devices Properties dialog box. Click the Volume tab. Go down to the Device Volume slider and move the arrow to your preferred sound level.
Click OK, and then click the Close button in Control Panel.
Display the Start menu by pressing Ctrl+Esc (or the Windows logo key). Then open Control Panel by pressing C.
In Control Panel, make sure you are in Classic View, with all Control Panel icons showing. If not, go to the left pane of Control Panel and open Switch to Classic View by pressing Tab and then Enter. Press the arrow keys to move to Sound and Audio Devices, and then press Enter.
In the Sound and Audio Devices Properties dialog box, on the Volume tab, adjust the Device volume by pressing the Right Arrow key for higher volume (louder), and the Left Arrow key for lower volume. Then press Enter.
Close Control Panel by pressing Alt+F, C.