There’s a common problem with especially laptop users with their keyboards – the keyboard behaves abnormally?
Is this what you see when you try to type in normally? The Solution to this problem is simple. You’re keyboard is NOT spoilt, but you have pressed the NUM-Lock key of your laptop. Disable NUM-Lock by pressing the NUM-Lock Key of your keyboard again. Once this is done, your keyboard will be back to normal ways!
Hope that helps!