Create a shortcut to lock computer

You can Create a shortcut to lock your computer.
Just follow the following steps to do this,

• Right click on desktop and select new -> shortcut.
  
  
• Then copy and paste this given text in the program location box
  "rundll32.exe user32.dll,LockWorkStation"
  
  
• Click next and enter a name for you shortcut and then click finish.

Now you can copy and paste that shortcut anywhere you want on your computer.