| Cause Category | Specific Reason | |----------------|------------------| | | The driver files were never copied correctly during installation. | | Boot-Time Loading Failure | A conflicting third-party driver (another AV or filter driver) loaded first and blocked Trend Micro. | | Secure Boot / Driver Signing | On Windows Server 2016/2019/2022, driver signature enforcement may reject unsigned or improperly signed drivers. | | Kernel Module Compilation Failure | On Linux, the driver fails to build against the current kernel (after an update). | | Permissions or SELinux | The agent lacks privileges to load kernel modules. | | Partial Uninstall / Upgrade | An upgrade left behind old driver references in the registry or module loading order. |
On Linux, the driver offline error manifests as: | | Kernel Module Compilation Failure | On
Anti-Malware: Driver offline / Not installed - Deep Security | On Linux, the driver offline error manifests
If the driver files are missing:
: Conflicts with specific third-party certificates can cause this status. Trend Micro provides a manual cleanup process for this specific certificate issue Agentless (VMware) Guest OS Sleep State | On Linux