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This guide addresses the "Anti-Malware Driver Offline / Not Installed" status in Trend Micro Deep Security, a common hurdle that leaves endpoints vulnerable.
Troubleshooting "Anti-Malware Driver Offline" in Trend Micro Deep Security
Seeing the "Anti-Malware Driver Offline" or "Not Installed" alert in your Deep Security Manager (DSM) console typically means the agent cannot verify the working status of the Anti-Malware module. Whether you are using agent-based or agentless protection, here is how to resolve the issue. 1. Identify the Root Cause Before diving into fixes, check for these common culprits:
Missing Root Certificates: On Windows, if Microsoft root certificate updates are missing, the OS cannot verify the driver’s digital signature, preventing installation.
Software Conflicts: Pre-existing antivirus software like Trend Micro OfficeScan, Apex One, or third-party products often block the Deep Security driver.
Corrupted Installation: A failed or partial installation process can leave drivers in a "limbo" state.
Secure Boot: On Linux, Secure Boot might be enabled without a public key enrolled, blocking the driver. 2. Verify Services and Drivers
Ensure the necessary services are active on the affected machine. Open a command prompt as an administrator and run:
# Check primary services sc query "Trend Micro Deep Security Agent" sc query "Trend Micro Solution Platform" (AMSP) # Check specific drivers (version 12.5 or earlier) sc query tmcomm sc query tmactmon sc query tmevtmgr Use code with caution. Copied to clipboard
If these show as stopped, attempt to restart the Trend Micro Deep Security Agent service. 3. Step-by-Step Resolution (Agent-Based) If basic service restarts fail, follow this sequence:
Update Certificates: Ensure the machine has the latest required root certificates (e.g., DigiCert, VeriSign, USERTrust). This is often the primary fix for Windows machines. Remove Conflicts: Uninstall any other antivirus products.
Manual Reinstall: A standard uninstall often isn't enough if drivers are stuck. Manually uninstall the agent and reboot.
Verify stuck drivers are removed by checking Device Manager > Non-Plug and Play Drivers.
Reinstall using a freshly downloaded .msi package—never use a .zip for installation. 4. Special Considerations for Agentless Protection
For virtual machines protected via a Deep Security Virtual Appliance (DSVA):
VMware Tools: Ensure VMware Tools is installed with the Guest Introspection (vShield) driver selected.
Sleep Mode: If a VM enters a standby or hibernate state, it may lose communication with the vShield driver, triggering the "offline" status.
vMotion Issues: Temporary offline status can occur during Storage vMotion if the VM's UUID changes.
For more detailed walkthroughs, refer to the Deep Security Help Center or the official Trend Micro Success Portal.
Error: Anti-Malware Engine Offline - Deep Security Help Center
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. This guide addresses the "Anti-Malware Driver Offline /
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.
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
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
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: Part 1: Understanding the “Anti-Malware Driver” in Deep
Anti-Malware: Driver offline / Not installed - Deep Security
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.
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
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: Support Log Bundle – In DSM: Help →
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
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
Before troubleshooting, it is crucial to understand the architecture.
If you have completed all steps and still see the error, collect the following diagnostic information:
uname -a for Linux, winver for Windows)./var/log/ds_agent.log or C:\ProgramData\Trend Micro\Deep Security Agent\logs).Trend Micro support will often request a driver verifier dump (Windows) or a kdump (Linux) to check for kernel conflicts.
If Secure Boot is required by policy but blocking the driver, you must either disable it in the BIOS or sign the kernel module (advanced procedure). For most environments, disabling Secure Boot in the system BIOS is the standard fix for "Not Installed" driver issues on fresh deployments.