I don't believe this is referring to software it is referring to the shipping lock on the scanner...the actual lock.

Verify that the shipping lock on the scanner is in the unlocked (open padlock) position
the shipping lock is on the underside of the scanner.
If you have already unlocked the scanner, unplug the power and toggle the lock switch firmly 4 times, then plug the scanner power back in. Even though you may have already unlocked it, the hardware may not have fully disengaged the lock.