Trend Micro Deep Security Anti-malware Driver Offline Not Installed |work| [Latest]

"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

: On Windows, the OS may lack the root certificates (like SHA-2) required to verify the digital signature of the Anti-Malware driver, preventing it from loading. Third-Party Conflicts

: Other antivirus software (e.g., OfficeScan, Apex One, or Comodo) can block the installation or operation of the Deep Security drivers. Installation Corruption

: The agent installation may be broken, often requiring a manual cleanup of specific driver files. Secure Boot (Linux/Windows)

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

: 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

Anti-Malware: Driver offline / Not installed - Deep Security 8 May 2025 —

The "Anti-Malware driver offline/not installed" status in Trend Micro Deep Security typically indicates a corrupted installation, missing system certificates, or driver conflicts. Immediate Troubleshooting Steps

Check Services: Ensure that the Trend Micro Deep Security Agent and Trend Micro Solution Platform (AMSP) services are running on the endpoint.

Verify Drivers: Open a command prompt as an administrator and run sc query AMSP (and tmcomm, tmactmon, tmevtmgr for versions 12.5 or older) to see if they are active.

Update Certificates: If the server lacks the latest Root Certificates (DigiCert, VeriSign), it may fail to verify the driver's digital signature, preventing installation. Run Windows Updates or manually patch certificates.

Check Conflicts: Ensure no other antivirus products (like OfficeScan or Apex One) are running, as they can block driver installation. How to Resolve the Issue

If simple service restarts don't work, a full reinstallation is often the most effective fix:

Deactivate the Agent: From the Deep Security Manager (DSM), right-click the computer and select Actions > Deactivate. Uninstall and Clean: Uninstall the Deep Security Agent via Control Panel.

If files remain, manually delete them from C:\Program Files\Trend Micro\Deep Security Agent\ and C:\Program Files\Trend Micro\AMSP\.

Check Device Manager for any leftover non-plug-and-play drivers (like tmactmon or tmcomm) and uninstall them if present.

Reboot: This is critical to clear any drivers still held in memory.

Reinstall and Reactivate: Install the latest MSI package (do not use the .zip) and reactivate it from the DSM. Virtual Environments (vSphere)

If you are using agentless protection on a VM, ensure the following:

VMware Tools: The "Endpoint Drivers" or "vShield Endpoint" must be installed using the Complete or Custom installation option.

Power States: VMs in standby or hibernate mode may lose communication with the security appliance, triggering this status. AI responses may include mistakes. Learn more

Error: Anti-Malware Engine Offline - Deep Security Help Center

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): "Anti-Malware Driver Offline" "Not Installed" in Trend Micro

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

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.

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:

Real-time malware detection and blocking
Behavioral analysis and monitoring
File and process reputation analysis
Cleaning up malware infections

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:

The driver was not installed correctly
The driver was disabled or uninstalled
A system update or reboot caused the driver to become offline
A conflict with another security solution or driver

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:

Download the offline installer: Log in to the Trend Micro Deep Security console and navigate to the Agents page. Click on the Download button next to the Offline Installer option. Save the installer to a USB drive or a network share.
Copy the installer to the affected system: Copy the offline installer to the system where the anti-malware driver is offline.
Run the installer: Run the offline installer on the system. The installer will detect the existing Trend Micro Deep Security agent and update it with the latest anti-malware driver.
Restart the system: Restart the system to complete the installation.

Verify the anti-malware driver status

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

Open the Trend Micro Deep Security console: Log in to the Trend Micro Deep Security console.
Navigate to the Agents page: Navigate to the Agents page.
Check the agent status: Check the status of the agent on the system where the anti-malware driver was installed. The status should show Connected and Anti-malware driver: Online.

Troubleshooting tips

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

Check system requirements: Ensure that the system meets the minimum requirements for Trend Micro Deep Security.
Check for conflicts with other security solutions: Ensure that no other security solutions are installed on the system that may be conflicting with Trend Micro Deep Security.
Check system logs: Check system logs for errors related to the anti-malware driver.

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.

Seeing the error "Anti-Malware Driver offline/Not installed" in Trend Micro Deep Security usually means the agent’s core protection module has failed to initialize or has been blocked. This status leaves your server vulnerable as the agent cannot monitor or block malicious activity. Why Is This Happening?

Corrupted Installation: The most common cause is a failed or incomplete installation of the Deep Security Agent (DSA) .

Missing Root Certificates: On Windows, the OS may lack the necessary CA certificates to verify the driver's digital signature, preventing it from loading.

Security Software Conflicts: Existing antivirus programs like Trend Micro OfficeScan or third-party AVs can block the DSA driver installation.

Secure Boot Issues: For Linux systems, Secure Boot may be enabled without the proper public key enrolled for the Trend Micro driver. How to Fix It (Step-by-Step) 1. The "Clean Slate" Method (Recommended)

Since corrupted files often cause this, a clean reinstall is usually the fastest fix. Deactivate the agent in the Deep Security Manager (DSM) .

Uninstall the Deep Security Agent from the affected machine.

Manual Cleanup: Open a Command Prompt as Admin and ensure these driver services are fully removed: sc delete tmactmon sc delete tmcomm sc delete tmevtmgr Reboot the server to clear remaining hooks. Reinstall the agent and reactivate it from the Manager. 2. Verify OS Environment

If a reinstall fails, the underlying OS might be blocking the driver:

Windows Updates: Ensure the server has the latest Microsoft root certificate updates so it can trust Trend Micro’s signed drivers. Why is the Trend Micro Deep Security anti-malware

Conflict Check: Remove any old OfficeScan/Apex One clients or third-party AV agents before installing Deep Security.

Secure Boot (Linux): If using Linux, either disable Secure Boot or enroll the Trend Micro public key. 3. Agentless Protection (VMware/NSX)

If you are seeing this error in a virtual environment using agentless protection:

Verify that Guest Introspection is installed and running in your vSphere/NSX environment .

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

For deeper troubleshooting, you can generate a Diagnostic Package from the Agent to send to Trend Micro Support .

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

The "Anti-Malware Driver Offline" or "Not Installed" error in Trend Micro Deep Security typically indicates a corruption in the agent installation or a failure in the underlying security services. Common Causes

Corrupted Installation: The agent software did not install properly or critical files have been damaged.

Missing Certificates: The system lacks required root certificates (e.g., VeriSign or DigiCert) needed to verify the driver’s digital signature.

Secure Boot Issues: On Linux, Secure Boot may be enabled without the necessary Trend Micro public key enrolled.

Software Conflicts: Co-existence with other antivirus products like OfficeScan or Apex One can block the driver from loading. Recommended Troubleshooting Steps

Warning: Anti-Malware Engine has only Basic Functions | Deep Security

Step 1: Verify Hypervisor Integration Tools

For VMware:

Open vSphere Client → VM → Summary.
Check "VMware Tools" status. It must say "Running (Current)" .
If outdated, right-click VM → Guest OS → Upgrade VMware Tools.
Reboot the VM.

For Hyper-V:

Open Hyper-V Manager → VM → Settings → Integration Services.
Ensure all services (especially "Heartbeat" and "Guest Service Interface") are checked.
Inside the VM, verify C:\Windows\System32\vmictimeprovider.dll exists.

8. Best Practices for Offline Deployments

Use Trend Micro’s official offline agent installer (includes all modules).
Keep a local offline signature update tool (Trend Micro provides dsa_updater.exe for manual updates).
Ensure DSM is accessible on the internal network (even if no internet).
Test driver loading before deploying to production offline servers.

If you need step-by-step CLI commands for a specific Windows Server or Linux offline deployment, let me know the OS version and I can provide exact instructions.

The status "Anti-Malware: Driver offline / Not installed" indicates that the Deep Security Agent (DSA) cannot communicate with or find the required anti-malware kernel drivers on the host system

. This critical error prevents the anti-malware module from functioning, leaving the machine unprotected. TrendMicro Core Causes Corrupted Installation:

Remnants from previous installations or failed updates can block new drivers from loading. Secure Boot Conflicts: On Linux and modern Windows systems, having Secure Boot

enabled without the Trend Micro public key enrolled will block the driver from loading. Missing Certificates:

The Windows OS may lack the necessary CA certificates (like VeriSign or DigiCert) required to verify the driver’s digital signature. Software Conflicts:

Other antivirus products (e.g., OfficeScan, Apex One, or third-party AVs) can conflict with the Deep Security driver installation. Kernel Incompatibility (Linux):

The current Linux kernel version may not be supported by the installed agent, requiring a new Kernel Support Package (KSP). TrendMicro Troubleshooting & Fixes 1. Verify Services and Drivers (Windows)

Run the following commands in an administrative Command Prompt to check if core drivers are active: www.trendmicro.com sc query AMSP sc query tmcomm sc query tmactmon sc query tmevtmgr

Note: If any are not running, restart the "Trend Micro Deep Security Agent" and "Trend Micro Solution Platform" services. www.trendmicro.com 2. Manage Secure Boot If Secure Boot is enabled, you must either enroll the Trend Micro public key 3.3 Security Software Conflicts

or temporarily disable Secure Boot to confirm it is the cause of the offline status. www.trendmicro.com 3. Clean Reinstallation

A standard uninstall often leaves files behind. For a complete fix: Uninstall Deep Security 12-Sept-2022 —

When the Trend Micro Deep Security Notifier displays "Driver offline / Not installed," 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

Before performing a full reinstallation, try these quick fixes:

Restart Services: Open the Windows Services console and ensure the Trend Micro Deep Security Agent and Trend Micro Solution Platform (AMSP) services are running.

Check Driver Status: Open a command prompt as an administrator and run sc query AMSP, sc query tmcomm, sc query tmactmon, and sc query tmevtmgr. If any are stopped, attempt to start them manually.

Verify Installation File: Ensure you used the .msi installer rather than extracting files from a .zip package, as the latter can lead to incomplete driver registration. Root Causes and Solutions 1. Corrupted Installation

A failed update or partial uninstall often leaves behind registry keys that block new drivers from installing.

Solution: Perform a manual uninstallation. Go to Device Manager, enable "Show hidden devices," and under Non-Plug and Play Drivers, uninstall tmactmon, tmcomm, and tmevtmgr. Reboot the machine before attempting a fresh installation of the latest agent version. 2. Certificate and Digital Signature Issues

Outdated root certificates on Windows servers can prevent the system from verifying the digital signatures of Trend Micro drivers.

Solution: Ensure the server has the latest Microsoft root certificate updates. In some cases, conflicting third-party certificates (like Comodo) must be cleared and reinstalled to allow the Trend Micro drivers to initialize properly. 3. Secure Boot and Kernel Compatibility (Linux)

On Linux systems, the Anti-Malware driver (VFS_Filter) may fail if the kernel is unsupported or if Secure Boot is blocking the module.

Solution: Check your kernel version against the Trend Micro Support Matrix. If Secure Boot is enabled, you must enroll the Trend Micro public key to allow the driver to load. 4. Agentless Protection (VMware Environments)

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

The "Anti-Malware Driver Offline" or "Not Installed" error in Trend Micro Deep Security indicates that the Deep Security Manager (DSM) cannot communicate with the agent's underlying anti-malware components. This typically stems from certificate issues, installation corruption, or service failures. Common Root Causes

Missing CA Certificates: The Windows OS may lack the root certificates (e.g., VeriSign, DigiCert, Comodo) required to verify the driver's digital signature, preventing it from loading.

Installation Corruption: A failed or partial installation of the Deep Security Agent (DSA) can leave anti-malware drivers in a broken state.

Third-Party Conflicts: Existing antivirus software (like OfficeScan or Apex One) can conflict with the DSA anti-malware driver installation.

Power Management: For agentless protection, if a virtual machine enters standby or hibernation, communication with the vShield driver may be lost.

Secure Boot: On newer systems, if Secure Boot is enabled but the Trend Micro key is not enrolled, the driver will be blocked from loading. Troubleshooting and Resolution Steps 1. Verify Core Services and Drivers

Ensure the required services are running on the Windows endpoint:

Services: Use services.msc to confirm that the Trend Micro Deep Security Agent and Trend Micro Solution Platform (AMSP) services are "Running".

Driver Status: Run the following commands in an Administrative Command Prompt to check driver health: sc query AMSP sc query tmcomm sc query tmactmon sc query tmevtmgr

If any are stopped, attempt to restart the Trend Micro services. 2. Resolve Certificate Issues

If signature verification fails (often signaled by Event ID 9017), you may need to manually update root certificates:

Root Causes

The failure to install the Anti-Malware driver (kernel module) is usually caused by one of the following factors:

Missing Kernel Headers/Devel Packages: The Deep Security Anti-Malware driver is a kernel module. On Linux systems, if the kernel headers matching the current running kernel are not present, the driver cannot compile or install.
Incompatible Kernel Version: The operating system kernel has been updated to a version newer than what the current Deep Security Agent supports.
Secure Boot (UEFI): If Secure Boot is enabled in the BIOS, the operating system may block the loading of unsigned third-party kernel modules (like the Trend Micro AM driver).
GCC Compiler Issues: The driver compilation process requires the GNU Compiler Collection (GCC). If the version of GCC used to compile the kernel differs from the version installed on the system, compilation may fail.
File System Permissions: The account running the Deep Security Agent service may lack the necessary permissions to write to the module directories (e.g., /lib/modules).

3.3 Security Software Conflicts

Microsoft Defender: If Defender’s real-time protection is still active in “passive mode” or blocking kernel driver loads via Hypervisor-protected Code Integrity (HVCI), Trend Micro’s driver may fail to start.
EDR Overlap: Other EDR/XDR solutions using file minifilter drivers can cause load order deadlocks.
Group Policy Restrictions: LoadDriver privilege removed from the Trend Micro service account, or Device Guard / AppLocker policies blocking *.sys files from loading.