Always wanted to trick everyone at school?
This method has a 100% succes rate!
At least, if you can start CMD the usual way.
Here we go, on the new school PC's.

Press Windows button + R to start Run, typ in "cmd" and press enter.

First, change the colour to blue/white, using this command: color 1f and press enter.
Next, typ in: @echo off and press enter.
Next, typ in: cls and press enter.

And now, typ in a random text and press Alt+Enter to start Full Screen.
And now, show it to your school mates!

Well, small and easy tutorial.
That's enough Windows for now, we will continue to Linux later.