Missing icons from the taskbar

Having problem with missing icons from the taskbar? There are severals solutions to this problem and now I would like to introduce an effective way: "Backing up the Registry by creating a restore point".
Please follow these instructions:
1. Go to Start > Run (Windows-key+R).
2. Type "regedit" and click OK.
3. Navigate to the key HKEY_CURRENT_USERS > Software > Classes > Local Setting > Software > Microsoft > Windows > CurrentVersion > TrayNotify.
4. Delete the value IconStreans and PastIconsStream.
5. Open up the Task Manager(Ctrl+ Shift+ Esc) then go to the Process tab, select explorer.exe and click End Process.
6. Open the Applications tab and click New Task at the bottom-right of the window.
7. Type : explorer.exe in the message box that pops up then click OK.
8. explorer.exe will reload, and the missing icons should now be back in the taskbar.
9. Then if the volume bar isn't there, go to taskbar properties (where the volume was gray) and simply tick the box.