Keyboard just...froze!

My dad wants to learn to use computers. So he took out my former computer (laptop), the compaq 1200.

He was using it and just installed a program called typing tutor 7 and was doing the first lesson.

We turned it off, got something to eat, came back and opened up TT7 for a crossword game that teaches you how to type.

He clicks on the keys and none of them work! Like if you click “g”, the letter “g” doesn’t appear in the box. The keys are just dead…

What can I do?