Problem:
Some time it happens that you want to change the volume from the task-bar and the volume control button is not there.
No need to worry, this is a simple trouble to fix.
Solution:
This problem can be fixed in 4 easy steps
1. Open control panel
2. Open Sound and audio devices
3. Check the Place volume icon in taskbar ( if it is already checked, un-check and check once)
4. Click on Apply and then Ok button.