Trend Micro Deep Security Anti-malware Driver Offline Not Installed

"Anti-Malware Driver Offline" "Not Installed" in Trend Micro Deep Security indicates that while the Deep Security Agent (DSA) may be running, its specific protection module for malware cannot communicate with the core operating system. www.trendmicro.com Common Root Causes Missing CA Certificates

Corrupted Installation: A failed or partial installation process can leave drivers in a "limbo" state.

If the driver fails to install repeatedly, the OS may not trust the Trend Micro signature. Ensure the server has the latest Microsoft updates. "Anti-Malware Driver Offline" "Not Installed" in Trend Micro

The word "offline" is key. It does not mean the VM is powered off. It means the driver service is not responding to DSM heartbeats.

Secure Boot Issues: On Linux, Secure Boot may be enabled without the necessary Trend Micro public key enrolled. OS/kernel updates If any are stopped, attempt to

Note: As of 2025–2026, Trend Micro has been migrating Deep Security capabilities into Vision One Workload Security. If you are on a very old version (e.g., Deep Security 12 or earlier), upgrading to a supported release may resolve persistent driver issues.