Install Trellix Endpoint Security (ENS) 26.x on endpoints that aren't managed by a network management platform.
Before the installation:
Verify that all endpoints meet the minimum requirements (KB82761).
Verify that required patches are applied to the endpoints (KB96488).
Verify that you're aware of compatibility requirements for other installed products.
On endpoints running Microsoft Windows 10 October 2018 Update or later, verify that the case-sensitivity attribute is disabled for folders in your source and target installation paths and \Windows\System32\drivers.
Verify that you have permission to access the user temp folder (KB85033).
Verify that the newer Root Certificates have been applied to the endpoints (KB91697).
Note
Best practice: Use the latest version of the Trellix SysPrep utility when upgrading from version 10.5.3 or earlier, or when new software or policy configurations are used in software metering, software monitoring, or rights management. Check with technical support for the latest version of Trellix SysPrep.
Note
The installer now automatically detects missing Root or Intermediate certificates on the endpoint before proceeding. This check prevents installation failures caused by incomplete certificate chains.
After the installation:
Manually update your endpoint with the latest version of the content files required by Trellix ENS for AMCore, Exploit Prevention, and Adaptive Threat Protection.
Disable the Windows firewall to avoid conflicts with McAfee Host IPS rules.
Configure your settings as needed.