Instead of pressing CTRL+ALT+DEL or windows + L to lock your machine you can create an icon to lock your machine. There are very simple steps by using it you can simply lock your computer
using single mouse click.
Just Follow the simple step:-
1. Right click
an empty spot on the desktop, point to New and click Shortcut.
2. In the Create Shortcut dialog box, type the following in the 'Type the location' of the item text box:
rundll32 user32.dll,LockWorkStation
3.Then in 'type a name for this shortcut' box write ''''anyname
4.Click finish
5.Now when you click the icon your computer will be locked.