Logitech G603 LIGHTSPEED Frequently Asked Questions Manual page 7

5. Check Delete the driver software for this device and then click Uninstall.
6. Unplug the device and plug it back into a different USB port. It should re-enumerate and
be detected in G HUB.
7. G HUB should then download the driver for your device.
 +Connect the G603 gaming mouse to a compatible device