Northern Ireland is the smallest of the four countries of the United Kingdom in terms of both area and population, containing 2.9% of the total population and 5.7% of the total area of the United Kingdom.
If you are using a wireless mouse with a USB connector and a PS/2 keyboard, verify that the USB mouse is plugged in a USB port on the computer and that the purple keyboard PS/2 plug is connected to the purple PS/2 port on the computer.
If you have a current Logitech wireless keyboard, mouse or touchpad, this is the device that enables communication between your 'puter and the input device. 10 years ago the transceiver for wireless mice and keyboards was about the size of a travel mouse.