Answer :
Final answer:
The VirusScan menu option used to unlock the user interface is 'Unlock Interface', which allows users to regain access to the interface, typically requiring a password or security authentication. Thus, the correct option is 4.
Explanation:
The menu option used to unlock the user interface in VirusScan is Unlock Interface. This option is usually found in the settings or preferences menu of the antivirus software. It allows the user to regain access to the interface if it has been locked for security reasons or to prevent unauthorized changes. For instance, in a scenario where an administrator has locked down the antivirus settings to prevent tampering, the Unlock Interface option would require a password or some form of security authentication to enable changes.
