...》The simplest method: use the shortcut key win (Windows logo key) d.
...》A more complicated method: open the "Notepad" program and enter the following content:
[Shell]
Command=2
Command=2
[Shell]
Command=2
p>
IconFile=explorer.exe, 3
[Taskbar]
Command=ToggleDesktop
Then save this file in: C:\Documents and Settings\Username\Application Data\Microsoft\Internet Explorer\Quick Launch directory, name it: Show Desktop.scf.