The optional keyboard does not work (Windows 10). How do I make the settings?

[Microsoft Windows]

Hello!On the user's personal computer, the additional keyboard (the numbers on the right side of the keyboard) has recently stopped working. We have tried connecting different keyboards and everywhere those numbers on the right side of the keyboard are not displayed when you press them.How to set up an additional keyboard? How to make those numbers on the right side of the keyboard work again?We have tried pressing the Numlock key, but the numbers are still not displayed.What can be done?The extra keyboard is only not working on a particular computer. When I connected the same keyboards to oth

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