- Windows Updates: Updates may have reactivated certain components, including Windows Defender Firewall, or restored default security settings.
- Firewall settings: The firewall might have remained active even though other security services were disabled.
- Third-party applications: Some third-party applications may have reset or modified security settings, leading to the firewall’s reactivation.
- Changes in registry or group policy: Your previous deactivation of Windows Defender might have been reversed due to system security policies or registry changes, possibly after updates.