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Install Trellix Endpoint Security (ENS) 26.x using the product installer

  • Published on Sep 13, 2026
  • 1 minute(s) read
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On a self-managed endpoint, running the product installer on the endpoint is the simplest way to install Trellix Endpoint Security (ENS) 26.x.

When there is a reboot pending related to operating system updates, previous installs, or third-party application changes on the endpoints with Trellix Agent 5.7.4 or later, install or upgrade of Trellix Endpoint Security (ENS) on those endpoints will not occur until the operating system is rebooted.

Note

When installing Trellix ENS on Windows Server 2016, version 1803, or newer, or Windows Server 2019, or newer, the Windows Defender installed on your endpoints can be disabled manually. If the endpoints are onboarded to Microsoft Defender for Endpoint on Windows Server, version 1803 or newer, or Windows Server 2019, or newer, then Windows Defender can be set to passive mode manually. For more information about Windows Defender status after installing ENS, refer to the following Community Article

  1. Download the Endpoint_Security_Version_Standalone_Client_Install .zip file, unzip the contents of the file, then double-click setupEP.exe.

    If you purchase the product online, you receive an email with instructions and a URL for downloading the product.

  2. On the License Agreement page, click Accept.

  3. Resolve any conflicts detected by the installer.

    The wizard tries to remove conflicting virus-detection and firewall software products automatically. If it can't, it prompts you to remove them manually, then prompts you to restart the endpoint.

    • If you restart the endpoint immediately, installation resumes afterward.

    • If you restart the endpoint later, run the installer again at your earliest convenience.

  4. If you don't want to install all product modules with the default settings, select new settings on the Install Options page.

    Endpoint Security Platform (the Common module) installs automatically with the first module you install.

  5. Click Install.

    A dialog box shows the progress of the installation and notifies you when it is complete. You can cancel the installation at any time, if needed.

  6. Click Finish to close the installer.

    As a best practice, we recommend restarting the endpoint after the upgrade completes.

To verify that Trellix ENS installed on the endpoint, open the Windows Control Panel and check that version 26.x of each product module you selected to install appears. You can also check that no errors or failure messages appear in the installation log file.

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