1. Paste following code in Notepad and save the file with name
"Show Desktop.scf" (including quotes):
Code:
[Shell]
Command=2
IconFile=explorer.exe,3
[Taskbar]
Command=ToggleDesktop
2. Now you have to copy this new file and paste in "Quick Launch" toolbar. You can do it in 2 ways:
A. Drag-n-drop the new file to Quick Launch toolbar.
B. Type "
%appdata%\Microsoft\Internet Explorer\Quick Launch" in RUN dialog box and press Enter. It'll open Quick Launch folder. Paste the file in this folder.
Taken from
here.