how to fix my keyboad

Question

I was working with my laptop suddenly the some problems happen for my keyboard. the

J switch to 1

K switch to 2

L switch to 3

U switch to 4

I switch to 5

and ...

How can I fix this? and If you, know what do you guess about the reason of this problem?

Ps : I have two keyboard and I am using that one which exclude from the keyboard.

Answer 1

You may have pressed Num Lock key by mistake.

Just press it one more time, and Bingo!