If your keyboard keys stop working, it doesn't necessarily mean they're broken or need replacement. From checking keyboard ...

Open your keyboard or mouse driver properties and click on the Roll Back Driver button under the Driver tab. Follow the on-screen instructions to roll back the driver. Reset your BIOS settings to ...

Although the OS doesn’t offer an option in Windows Settings, you can reset the Touch keyboard to the default position using Registry Editor. When your physical keyboard is not working ...