Installed — Trend Micro Deep Security Anti-malware Driver Offline Not
: The current Linux kernel or Windows build is not yet supported by the installed DSA version.
This guide addresses the "Anti-Malware Driver Offline / Not Installed" status in Trend Micro Deep Security, a common hurdle that leaves endpoints vulnerable.
The "Trend Micro Deep Security Anti-Malware Driver Offline Not Installed" error is more than a nuisance—it’s a security gap. In this state, your workloads are running blind, unable to detect file-based malware, ransomware, or webshells.
Outdated root certificates on Windows servers can prevent the system from verifying the digital signatures of Trend Micro drivers. : The current Linux kernel or Windows build
Agent self-protection prevents manual restart, reinstallation, or debugging of the DSA service, blocking driver installation attempts.
By following this comprehensive guide, you can systematically identify and resolve the root cause of the "Anti-Malware Driver Offline" error, ensuring your Trend Micro Deep Security agent returns to full operational health.
You are encountering an issue where the Deep Security Anti-Malware (AM) driver is either missing, listed as "Offline," or fails to install on the target machine. This prevents the Real-Time Scan from functioning correctly. In this state, your workloads are running blind,
The system's UEFI Secure Boot blocks the Trend Micro driver because it lacks a trusted signature or registered Machine Owner Key (MOK).
: Run mokutil --sb-state to verify if Secure Boot is active.
If this fails with an "Access Denied" or "File Not Found" error, your installation files are likely locked or corrupted. Step 3: Address Windows Secure Boot By following this comprehensive guide
: On Windows servers, the absence of updated CA certificates (like VeriSign or DigiCert) may prevent the OS from verifying the driver's digital signature, causing it to block the installation.
Update kernel-compatible driver or rollback kernel
When the Trend Micro Deep Security Notifier displays "," it typically signals a corrupted installation or a critical driver failing to load on the endpoint. This error prevents the Anti-Malware module from protecting the system, even if the main Deep Security Agent (DSA) appears active in the management console. Immediate Troubleshooting Steps
Ensure you have gcc , make , and the matching kernel-devel or linux-headers packages installed for your current kernel, or compilation will fail. 4. Resolving Deep Security Manager (DSM) Sync Issues