What is an automated control that prevents unauthorized access by verifying antivirus software on PCs categorized as?

The correct answer is preventive control because this type of control is specifically designed to prevent unauthorized access or actions from occurring. In the context of verifying antivirus software on PCs, the automated control is intended to ensure that all systems have up-to-date antivirus software installed before they can access the network or sensitive information. This action mitigates risks by stopping potential threats before they have the chance to exploit system vulnerabilities.

Preventive controls are proactive measures that aim to reduce the likelihood of security incidents occurring in the first place. By verifying antivirus software, the organization is taking steps to ensure that it is proactively protecting its systems from malware and other cyber threats.

In contrast, detective controls would monitor and identify security incidents as they occur, while corrective controls would be implemented after an incident has happened to restore systems and processes to their normal state. Directive controls are policies and procedures that guide employee behavior and decision-making regarding security practices. Therefore, the nature of the automated control in question aligns best with preventive control.