USB numpad driver installation instructions a) Go to start>settings>control panel, select add/remove programs. If Lenovo USB Numeric Keypad Driver Uninstall entry is present, select it and click 'change/remove'. Follow the instructions to uninstall the driver. Reboot when prompted. b) Attach USB numeric keypad to free USB port, allow device to enumerate c) Double click the setup file for the numpad driver installation and follow the prompts to install the driver. Reboot when prompted.