You want to secure your computer when you are away? This online tool locks your computer and alerts you whenever someone tries to access it.
How does it works?
Go to http://mouselock.co/
and sign in with your Google Account. You will be asked to choose a number between 1 and 10 to lock your screen. This number will be asked when the mouse is moved. If the wrong number is entered, you will automatically be notified by mail.