ON-SCREEN KEYBOARD

If you feel that your external keyboard is not working properly or some particular key is not functioning then you can use internal keyboard on your desktop screen. 

This property of keyboard is found in windows xp and seven.

Just follow these steps

Go to start menu and press “run”

Type  “osk”

Now press enter. 

Now you will see keyboard on your desktop screen. Now use mouse to click on keys for operation.