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.
1 The USB connection may be loose. 2  Try unplugging the mouse and plugging it back in. 3  Plug the mouse into a different USB port. 4  If your mouse is plugged into a USB hub or USB switch box, try removing it and plugging it directly into the computer. 5  Unplug other USB devices that are not in use.