Trend Micro Deep Security Anti-malware Driver Offline Not Installed

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

This message typically appears in Trend Micro Deep Security (now often branded as Trend Micro Vision One for workload security) when the anti-malware component cannot function because its core kernel driver is either:

The driver in question is responsible for real-time scanning, on-access protection, and malware prevention on the protected machine (workload — physical, virtual, or cloud).

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

Get-Service | Where-Object $_.Name -like "*tm*" -or $_.Name -like "*trend*"

Look for services like:

If they show Stopped, run:

Start-Service tmcomm
Set-Service -Name tmcomm -StartupType Automatic

If they are missing entirely, the agent installation is corrupt. Proceed to Step 4.

The error "Trend Micro Deep Security Anti-Malware Driver Offline Not Installed" typically occurs when the Deep Security Agent (DSA) experiences a corrupted installation, lacks essential operating system certificates, or faces conflicts with other security software. This status is often visible in the Deep Security Manager (DSM) console or through the Deep Security Notifier on the local machine. Common Causes for the Error

Understanding the root cause is critical for choosing the right fix:

Corrupted Installation: A failed or partial installation may prevent the anti-malware services from starting correctly.

Missing Root Certificates: 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.

Software Conflicts: Pre-existing antivirus solutions (e.g., OfficeScan, Apex One) can conflict with the Deep Security driver.

Virtualization Issues: For agentless protection, missing vShield/Guest Introspection drivers or power management settings (sleep/hibernation) can trigger an offline status. Step-by-Step Troubleshooting Solutions 1. Reinstall the Deep Security Agent

Most cases are resolved by a clean uninstallation followed by a fresh install.

Manual Uninstall: If the standard uninstaller fails, manually remove the agent.

Clean Up Drivers: Use the Command Prompt to stop and delete leftover driver services: sc stop tmactmon / sc delete tmactmon sc stop tmcomm / sc delete tmcomm sc stop tmevtmgr / sc delete tmevtmgr

Reboot: A system restart is required to clear active drivers from memory.

Reinstall: Run the latest agent installer and Reactivate the agent from the Deep Security Manager. 2. Verify Digital Certificates (Windows)

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

Check for the presence of the necessary root certificates (DigiCert, USERTrust).

Refer to the Trend Micro Success Portal for specific certificate update steps. 3. Manual Filter Driver Installation

If the engine remains offline after reinstallation, you may need to manually point the OS to the filter driver. Navigate to the network adapter properties.

Install the driver located at: C:\Program Files\Trend Micro\Deep Security Agent\infsys\WinxpRelease.

Verify the driver is loaded by running sc query vsepflt in an admin command prompt. 4. Troubleshooting Agentless (VMware) Environments

If you are using agentless protection via the Deep Security Virtual Appliance (DSVA):

Check VMware Tools: Ensure the "Guest Introspection" driver (vsepflt) is selected during the VMware Tools installation.

Test Connection: In the DSM, go to Computers, right-click your vCenter, and select Properties > Test Connection.

Power Settings: Disable sleep or hibernation on the protected VM, as these states can break the connection to the security appliance. 5. Linux-Specific Fixes For Linux systems showing an "Engine Offline" error:

Restart the service using: sudo /etc/init.d/ds_agent restart.

Check if the current kernel is supported by viewing the Deep Security Compatibility Matrix. Activate the agent - Deep Security Help Center

Here’s a detailed technical analysis of the scenario where the Trend Micro Deep Security Anti-Malware driver is not installed in an offline environment.

The anti-malware driver relies on the hypervisor’s file system filter. If VMware Tools is not installed or is severely outdated, the driver cannot be injected. In Hyper-V environments, the Linux Integration Services (LIS) or Windows Integration Components may be missing.

This issue typically occurs when the Trend Micro Deep Security Agent (DSA) is deployed to an endpoint, but the Anti-Malware (AM) module fails to activate. In the Deep Security Manager console, the Anti-Malware state shows as "Offline" or "Not Installed," leaving the endpoint vulnerable to threats.

This write-up outlines the root causes, troubleshooting steps, and resolution methods for this specific driver installation failure.

The "Anti-Malware Driver Offline Not Installed" error is primarily a compilation or loading issue on the host side. By verifying kernel header dependencies, checking Secure Boot status, and utilizing DSM for pre-compiled driver delivery, administrators can quickly restore protection to the endpoint.

Introduction

Trend Micro Deep Security is a comprehensive security solution that provides advanced threat protection for physical, virtual, and cloud environments. One of its key features is the anti-malware driver, which provides real-time protection against malware and other malicious threats. However, in some cases, the anti-malware driver may not be installed or may be offline, leaving the system vulnerable to attacks. In this article, we will discuss the Trend Micro Deep Security anti-malware driver offline issue and provide a step-by-step guide on how to install it offline. The driver in question is responsible for real-time

What is the Trend Micro Deep Security anti-malware driver?

The Trend Micro Deep Security anti-malware driver is a kernel-mode driver that provides real-time protection against malware and other malicious threats. It works by monitoring system activity, detecting and blocking malicious behavior, and cleaning up malware infections. The driver is a critical component of the Trend Micro Deep Security solution and is responsible for providing advanced threat protection, including:

Why is the Trend Micro Deep Security anti-malware driver offline?

There are several reasons why the Trend Micro Deep Security anti-malware driver may be offline, including:

How to install the Trend Micro Deep Security anti-malware driver offline

To install the Trend Micro Deep Security anti-malware driver offline, follow these steps:

Verify the anti-malware driver status

After installing the anti-malware driver offline, verify its status by following these steps:

Troubleshooting tips

If you encounter issues during the offline installation of the Trend Micro Deep Security anti-malware driver, here are some troubleshooting tips:

By following these steps, you should be able to successfully install the Trend Micro Deep Security anti-malware driver offline and ensure that your system is protected against malware and other malicious threats.

Troubleshooting Trend Micro Deep Security: Fixing the "Anti-Malware Driver Offline/Not Installed" Error 

If you are managing servers with Trend Micro Deep Security, seeing the status "Anti-Malware Driver Offline / Not Installed" can be frustrating. This error indicates that the Deep Security Agent (DSA) cannot communicate with or initialize the core anti-malware drivers, leaving your workload vulnerable.  Why is the Driver Showing as Offline? 

Commonly, this issue occurs on Windows machines when the installation is corrupted or a critical service fails to start. Key reasons include: 

Missing Root Certificates: The Windows OS may lack the necessary CA certificates to verify the driver’s digital signature, preventing installation.

Secure Boot Issues: On Linux or newer Windows servers, if Secure Boot is enabled and the Trend Micro public key isn't enrolled, the driver will be blocked.

Software Conflicts: Other antivirus products like OfficeScan, Apex One, or ServerProtect can prevent the DSA driver from loading.

Comodo Certificate Issues: A specific known conflict with Comodo certificates can trigger this "offline" status.  Step-by-Step Troubleshooting Guide  1. Initial Verification  Look for services like:

Before performing a full reinstall, check if the necessary services are running: 

Trend Micro Deep Security Agent and Trend Micro Solution Platform services should be "Running".

Run the following commands in an elevated command prompt to check driver status: sc query AMSP sc query tmcomm sc query tmactmon sc query tmevtmgr

If any of these are stopped, try restarting the Trend Micro Deep Security Agent service.  2. Resolving Secure Boot Conflicts 

If you have Secure Boot enabled, you must enroll the Trend Micro public key. Alternatively, you can temporarily disable Secure Boot to confirm if it is the cause of the offline status.  3. Fixing Certificate & Signature Issues 

If the server is not regularly updated, it may fail to verify the driver's signature: 

Apply the latest Microsoft Windows Updates to ensure root certificates are current.

If a Comodo certificate is causing the issue, you may need to manually delete specific driver files like tbimdsa.sys and tmcomm.sys before reinstalling.  4. The Clean Reinstallation (Recommended Fix) 

Most "corrupted installation" cases are best solved by a clean wipe and fresh install: 

Anti-Malware: Driver offline / Not installed - Deep Security

This error typically indicates a corrupted installation, driver signature issues, or conflicts with other security software on Windows machines TrendMicro Common Causes Corrupted Installation:

The agent service or specific driver files failed to register properly. Missing Certificates:

The Windows OS lacks the CA certificates required to verify the Anti-malware driver's digital signature. Third-Party Conflicts:

Existing antivirus software (e.g., Apex One, OfficeScan, or third-party AV) prevents the Deep Security driver from installing. Certificate Issues: A known conflict exists with specific Comodo certificates. Secure Boot (Linux):

On Linux systems, Secure Boot might be enabled without the necessary public key enrolled. TrendMicro Troubleshooting Steps

Anti-Malware: Driver offline / Not installed - Deep Security

If the driver is missing but binaries exist:

sc create ds_driver binPath= "C:\Program Files\Trend Micro\Deep Security Agent\driver\ds_driver.sys" type= kernel start= auto
sc start ds_driver