Trend Micro Deep Security Anti-malware Driver Offline Not Installed ((install)) -

Any made to the system before the error appeared.

Follow these steps in order to diagnose and resolve the driver offline issue across Windows and Linux environments. 1. Execute a Basic Verification and Reboot

Running concurrent real-time endpoint scanners creates software conflicts. Legacy software like Trend Micro OfficeScan, or third-party enterprise tools, can lock down the file system and intercept kernel registrations, rendering the Deep Security Agent unable to attach its filter drivers. 4. Agentless vSphere / VMware Environment Misconfigurations

The VM's guest OS entered a power-saving standby state, breaking the EPSec/vShield pipeline. Any made to the system before the error appeared

Deep Security relies on ELAM (Early Launch Anti-Malware) and mini-filter drivers. If a Windows update or agent upgrade occurred recently, the OS will flag the driver as offline until a complete reboot cycles the kernel.

The driver signature verification fails because the Windows OS lacks the necessary Certificate Authority (CA) certificates to trust the driver's digital signature, or because the certificate chain cannot be built to a trusted root authority. This is especially prevalent in isolated environments without Windows Update.

: Ensure no other antivirus products (like OfficeScan or Apex One ) are running, as they can block driver installation. How to Resolve the Issue Execute a Basic Verification and Reboot Running concurrent

Sometimes the agent configuration gets desynchronized from the manager. Forcing a refresh can retrigger the driver installation. Log into the .

: 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

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

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).

Did this error start happening after an ? Is Secure Boot enabled on this specific machine?

Open a case if:

Trend Micro Deep Security Reviews & Ratings 2026 | Gartner Peer Insights