Sometimes You have to leave your system for a while say 5-10 minutes and you don’t want to shut it down and you also don’t want that somebody at your back use your system.The best thing to do at this point of time is to lock your Computer System Screen.
just follow these steps...

  • Right click on your computer screen and click on “New” and then on shortcuts.
  • After clicking  on shortcuts and then copy and paste the following code in the text box “rundll32.exe user32.dll, LockWorkStation “ (without quotes)
  • Now click on the Next  and it will ask you to name your shortcut.
  • Put in your desired shortcut name.
  • Now Click on the finish button
  • And that it.Your Shortcut button to lock your computer screen is ready