Major Windows updates (e.g., Win10 to Win11) can change the computer’s hardware ID, breaking software-based licenses. Use the License Transfer Tool to deactivate before the update, then reactivate after. If you forgot, contact Fanuc support.
Never share your legitimate serial number publicly. FANUC tracks licenses, and unauthorized sharing can lead to deactivation. If you need a serial number for a valid installation, obtain it only through official FANUC channels. fanuc ladder iii serial number