Trend Micro Deep Security Anti-malware Driver Offline Not Installed <EXTENDED>

This issue means the core kernel-level driver responsible for real-time scanning and malware prevention is not functioning. Consequently, the affected machine is exposed to threats. This article provides a comprehensive guide to understanding, diagnosing, and resolving this driver issue in Deep Security. What Does "Anti-Malware Driver Offline" Mean?

dsa_control -c

Once you resolve the “Anti-Malware Driver Offline Not Installed” error, implement these best practices:

Secure your data center from the hypervisor down. With the anti-malware driver online, Deep Security can finally do its job.

: On Windows, if Microsoft root certificate updates are missing, the OS cannot verify the driver’s digital signature, preventing installation. This issue means the core kernel-level driver responsible

When the Deep Security Manager (DSM) console shows the "Anti-Malware Driver Offline" or "Not Installed" status, it indicates that: The driver failed to load during the agent startup. The driver crashed during runtime. The driver file is corrupted or missing.

Use the command line to check the true status of the module: dsa_query -c ComponentInfo Linux: /opt/ds_agent/dsa_query -c ComponentInfo Look for the "Anti-Malware" status. 3. Reinstall or Repair the Agent (Windows)

The "Anti-Malware Driver Offline - Not Installed" error in Trend Micro Deep Security is a significant alert that should be addressed immediately. It is generally caused by pending reboots or installation corruption. By following the troubleshooting steps outlined above—starting with a reboot and moving to reinstallation—most cases can be resolved, restoring real-time protection to your endpoints.

The “offline” state is not a single failure but a symptom with several potential root causes, categorized below. What Does "Anti-Malware Driver Offline" Mean

This comprehensive guide breaks down the root causes of this common driver error and provides step-by-step instructions to get your security posture back to 100%. Root Causes of the "Driver Offline / Not Installed" Status

Turn the Anti-Malware state back to (or Inherited ), and click Save . Right-click the computer and select Actions > Send Policy . Step 5: Perform a Clean Reinstallation of the Agent

Connect to the affected VM (via RDP or console) and run PowerShell as Administrator:

If the driver is corrupt and you are in an (no internet), use the offline installer: : On Windows, if Microsoft root certificate updates

: Secure Boot may be enabled without the proper Trend Micro public keys enrolled, causing the system to reject the driver. Virtual Machine Standby

The agent was installed, but the kernel-level driver failed to load or was corrupted during the process.

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