Restore the deleted Show Desktop button in QuickLaunch bar

We can restore the accidentally deleted Show Desktop from Quick Launch bar by using two methods and they are
1.By using RUN
2.By using scf file
If the user  knows the shortcut key means this is no need.
Method  1:
1.Press Window key+R to open RUN.
2.Now type the following code in RUN and hit Enter.
                  regsvr32 /n /i:U shell32.dll

3.Now you need to restart or Logoff the system.

Method 2:
1.Open Notepad
2.Copy & Paste following code in Notepad and save the file with name "Show Desktop.scf"

[Shell]
Command=2
IconFile=explorer.exe,3
[Taskbar]
Command=ToggleDesktop

2.Now its time to copy this file and paste in quick launch toolbar. 

• We can do it in 2 ways drag-n-drop the new file to Quick Launch toolbar. 
• type "%appdata%\Microsoft\Internet Explorer\Quick Launch" in RUN dialog box and press Enter &it'll open Quick Launch folder and paste the file in this folder

Note: YOU HAVE TO SAVE THIS FILE AS "Show Desktop.scf" with quotes.