Keypad driver won't install on Win 8 or Win 10

Problem
When trying to update the keypad driver, the following error pops up: "The hash file is not present in the specified catalog file."

Solution
The keypad driver will not install on Windows 8 if driver signature enforcement is enabled. To disable it, follow these steps:
http://www.howtogeek.com/167723/how-to-disable-driver-signature-verification-on-64-bit-windows-8.1-so-that-you-can-install-unsigned-drivers/

Next, try installing the driver again. There will be a pop up from Windows Security, and click "Install this driver software anyway."