Trend Micro Deep Security Anti-malware Driver Offline Not Installed Guide

Cross-reference this version against the available on the Trend Micro Help Center.

Check that the are up to date and compatible with your Deep Security version.

: In agentless setups, if a VM enters a standby or sleep state, communication with the vShield driver is lost, triggering the offline status. TrendMicro Recommended Troubleshooting Steps

Check the Trend Micro compilation logs located at /var/opt/ds_agent/log/ to see if the driver compilation failed during the last kernel boot. Cross-reference this version against the available on the

Right-click the host, select , and click Clear Warnings/Errors .

If a reboot fails, check if the underlying Windows drivers ( tbproch , tmactmon , tmevtmgr , or tmka ) are registered and running. Open as an Administrator. Run the following command to check the driver status: sc query tmactmon sc query tmka Use code with caution. If the state is STOPPED , attempt to start it manually: sc start tmactmon sc start tmka Use code with caution.

Navigate to and double-click the affected machine. Go to Anti-Malware > General . Open as an Administrator

Verify that the following directories were completely removed (delete them manually if they remain): C:\Program Files\Trend Micro\Deep Security Agent\ C:\ProgramData\Trend Micro\Deep Security Agent\

: The initial installation was incomplete or files became corrupted. Certificate Issues

If a pre-compiled driver is unavailable, ensure your Linux system has gcc , make , and the matching kernel-devel or kernel-headers packages installed so the agent can build its own driver dynamically. Step 4: Reinitialize the Anti-Malware Module ensure your Linux system has gcc

Ensure the server has the latest Microsoft root certificate updates so it can trust Trend Micro’s signed drivers.

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 "Anti-Malware Driver Offline" or "Not Installed" error in Trend Micro Deep Security is a critical alert. It signifies that the Deep Security Agent (DSA) cannot communicate with or load its core kernel-level protection drivers. When this occurs, the host machine loses its real-time protection capabilities, leaving it vulnerable to threats.

Schedule and execute a full system reboot of the target machine.