Keyboard Number Pad Not Working

[masonleak]

Lately, my number pad on my keyboard has not been working, but every time I press 2, my computer starts doing all sorts of things and locks the entire keyboard, prohibiting me from typing. I then have to restart my computer to get the keyboard working again. How do I get my number pad to function properly and stop freaking out every time I press 2?

 

[MarkW]

Buy a new keyboard. They are pretty cheap.