Many users change the BIOS setting, see no difference, and assume it’s broken. It’s not broken—Windows is just overriding it.

The bootup NumLock state refers to the state of the NumLock key when a computer first starts up. Essentially, it answers whether NumLock is on or off when you power on your computer.

The NumLock key is a toggle key found on most computer keyboards. When pressed, it enables or disables the numeric keypad on the right side of the keyboard. When NumLock is on, the keypad keys produce numbers; when it's off, they act as navigation keys (like the arrow keys, Home, End, etc.).

Determines if the NumLock key is automatically enabled or disabled when the system starts.

Your login screen is the first point of OS interaction. If you use the number pad for your password or PIN (which many users do), you need NumLock .