1 Answer

This is how you do it according to E How .com

 Instructions

Windows Vista and 7

1Right-click the taskbar and click "Properties" to launch the "Taskbar and Start Menu Properties" dialog box.

2Click the "Notification Area" tab. Place a check on "Volume" under "System icons."

3Click "Apply" to save the changes and click "OK." You should now see the volume icon on the taskbar.

Windows XP

1Click the Windows "Start" menu and click the "Control Panel."

2Click the "Sound, Speech, and Audio Devices" option and click "Change the speaker settings" under "Pick a task."

3Select the "Volume" tab and place a checkmark on the " Place volume icon in the taskbar " option and click "OK" to save the changes.

References

Microsoft Support: Display the Volume Control Icon in the TaskbarWindows Reference: How to Put the Volume Mixer icon back on your taskbar in Vista. Hope this helps...