NumLock indicator does not light after Windows 7 system boot

Before booting is good, now suddenly it doesn't work. You have to manually click NumLock once. It is very inconvenient to enter the password. How is this going to happen? How to solve it?

Operation steps

After booting up, enter the password interface and manually click NumLock. After the NumLock light is on, do not enter the password into the system, but click the red shutdown icon in the lower right corner of the screen. The Numlock light will automatically turn on when you turn it off directly and then turn it on again.

After booting, press F2 or Del to enter the BIOS on the first interface. After entering Bios, use the keyboard to operate up and down, press Enter to select Advanced Bios Features. After entering, you can see the Boot Up NumLock Status, press the Enter key, then move up and down to select Off, then press F10 to save and exit.