The keyboard or mouse quit working

1. If the devices have usb connections, disconnect the keyboard or mouse and then reconnect them into different usb ports than they were connect to before.

2. If the keyboard or mouse has a ps/2 connection, unplug them and then plug them right back in. If that doesn't work, restart the computer. You may have to press and hold the power button until the computer turns off if you haven't any access to a pointing device or a working keyboard.