1. Wired mouse
    1. Unplug the cable from the USB port and plug it back it in.
    2. If that didn't help unplug the cable from the USB port and plug it into a different USB port. Most computers have USB ports on the front of the computer and in the back of the computer.
    3. If that didn't help restart the computer.
  2. Wireless mouse
    1. Make sure wireless USB device is plugged into the computer
    2. Replace the batteries in the mouse
    3. If that didn't help restart the computer