Missing files, partial upgrades, or interference from other third-party security software can corrupt the driver files.
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.
If the state is STOPPED or PAUSED , attempt to start it manually: sc start tbhook Use code with caution. Step 2: Fix Windows Driver Signature and Policy Issues
Open an Administrative Command Prompt and check if the core drivers are running: sc query tmactmon sc query tmevmgmt sc query trendmgr Use code with caution.
A standard uninstall often leaves files behind. For a complete fix: Uninstall Deep Security 12-Sept-2022 —
If blocked, enroll the Trend Micro MOK key using the mokutil utility provided in the Deep Security installation directory, reboot the system, and accept the key at the blue shim boot screen. The Ultimate Fix: Clean Reinstallation Missing files, partial upgrades, or interference from other
Install the latest compatible Deep Security Agent MSI package and re-activate it. 3. Troubleshooting Linux Environments
Set up an alert rule in DSM to notify the security team immediately when an agent status changes to "Anti-Malware Driver Offline," preventing prolonged coverage gaps.
In agent-based deployments, the driver’s start type may be set to Disabled (0x4) or Demand Start (0x3) instead of Boot Start (0x0). This prevents it from loading before the file system initializes.
The failure to install the Anti-Malware driver (kernel module) is usually caused by one of the following factors:
Error: Anti-Malware Engine Offline - Deep Security Help Center If the state is STOPPED or PAUSED ,
: Secure Boot may be enabled without the proper Trend Micro public keys enrolled, causing the system to reject the driver. Virtual Machine Standby
Here’s a detailed technical analysis of the scenario where the is not installed in an offline environment .
An means the server or workstation has no internet access (air-gapped, isolated network, or disconnected during OS deployment).
Any made to the system before the error appeared.
Before applying fixes, you must identify precisely where the driver layer is breaking down. 1. Check the Deep Security Agent Status Command For a complete fix: Uninstall Deep Security 12-Sept-2022
On Linux, Deep Security builds a kernel module dynamically using dkms or hooks directly into the kernel via the vfenit and vfsFilter drivers. Step 1: Check Kernel Module Status
To check whether the file-system mini-filter is actively monitoring system I/O, run: fltmc Use code with caution.
The operating system may be blocking the driver due to signature validation 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