My MK120 mouse or keyboard is not working

The problem is likely to be a defective product. Before contacting Logitech Technical Support, please check the following.

USB port:

1. Plug your MK120 mouse or keyboard securely and directly into a USB port on your computer. KVMs and hubs are not supported.

2. Try plugging your K120 mouse or keyboard into a different USB port.

Additional Information:

If the above solutions do not resolve your problem, you can contact Logitech Technical Support Here.