Win7 System lower right corner volume small horn icon is missing what to do?

Win7 System lower right corner volume small horn icon is missing what to do?

1, at the bottom of the computer right click the mouse, click Properties;

2, click the attribute, into the Diagram window, in this window to find the "volume" icon;

3, the "volume" icon set to open the State, and then click "OK" to save;

4, save and then check the lower right corner of the computer "volume" icon has appeared

Workaround Two:

1, press Ctrl+shift+esc key or at the bottom of the computer right mouse click, pull up Task manager;