Trend Micro Deep Security Anti-malware Driver Offline Not Installed |work| Online

If the above methods fail, consider these platform-specific or advanced solutions.

The "Anti-Malware Driver Offline - Not Installed" error in Trend Micro Deep Security is a significant alert that should be addressed immediately. It is generally caused by pending reboots or installation corruption. By following the troubleshooting steps outlined above—starting with a reboot and moving to reinstallation—most cases can be resolved, restoring real-time protection to your endpoints.

The agent was installed, but the kernel-level driver failed to load or was corrupted during the process.

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Since corrupted files often cause this, a clean reinstall is usually the fastest fix. the agent in the Deep Security Manager (DSM) . If the above methods fail, consider these platform-specific

Look closely at the Anti-Malware: row in the output to see if it reads Driver Offline or Not Installed . How to Fix the Error on Windows Hosts Solution 1: Perform a Clean Reboot

Delete remaining folders manually if they persist: C:\Program Files\Trend Micro\Deep Security Agent and C:\ProgramData\Trend Micro\Deep Security Agent . Reboot the machine.

Virtual machines cloned from catalog templates share the same BIOS UUID, blinding the DSM's tracking database. Technical Verification: Identifying the Broken Links

Avoid keeping legacy agents running on modern operating systems. Align your agent upgrade schedules to deploy stable DSA versions at least once a quarter. This link or copies made by others cannot be deleted

Resolve Secure Boot / signing issues (Linux)

An interrupted installation process, installing a raw package ZIP instead of the proper Windows Installer (MSI), or severe operating system hangs can leave the system with missing core components. The AMSP service fails to register properly, resulting in a broken state where the driver appears completely absent.

Outdated root certificates on Windows servers can prevent the system from verifying the digital signatures of Trend Micro drivers.

Note: Avoid using Windows "Fast Startup" shutdowns, as they do not fully reload the kernel. Use shutdown /r /t 0 from the command line to force a clean restart. having Secure Boot

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If you run other security monitoring tools (like EDR or forensic tools), configure mutual exclusions. This prevents multiple security drivers from locking the same system file-system hooks.

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

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