Hi there,
To begin, please ensure your device is running Windows 10 Enterprise or Windows 10 Education, as ESU is only available for specific editions. You’ll also need an active ESU license, which can be obtained through a Microsoft Volume Licensing agreement or a Cloud Solution Provider (CSP). Once you have the license, you’ll need to install the ESU activation key using the Volume Activation Management Tool (VAMT) or via command line, followed by a system restart.
After activation, your device should automatically receive security updates through Windows Update. If you run into any issues during the process, feel free to share the error message or behavior you're seeing.
If this helps you get ESU successfully installed, please click “Accept Answer” so others with the same question can benefit too 😊.