This detection rule identifies instances where the Windows Defender Firewall service fails to load the Group Policy settings due to an Event ID 2009. Such failures may indicate attempts to alter firewall configurations or issues with security policy enforcement, which are critical for maintaining system integrity and defending against potential threats. Monitoring Event ID 2009 is essential for identifying and responding to incidents that may undermine firewall protection and expose the system to increased risk. The rule performs a straightforward check for the specified Event ID in Windows logs, allowing administrators to take prompt action upon detection.