number button not working

[ark4an9]

in my keyboard 1 num button is not working and i am using it through numpad but i am not able to use exclamatory mark button which is accessed by pressing shift button. The number is working when i my laptop is in sleep mode or when i start my laptop it starts typing on its own and when i try to use it it is not working .so can someone help me troubleshoot this problem and i tried by updating my driver .

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