1. Executive Summary The Windows Assessment and Deployment Kit (ADK) is a set of tools from Microsoft used to customize, assess, and deploy Windows operating systems to large numbers of devices. An "offline installer" refers to the full, standalone executable file that contains all ADK components (or a user-selected subset) without requiring a continuous internet connection during installation. This is critical for secure, air-gapped environments or sites with limited/unreliable bandwidth. 2. Key Characteristics of the Offline Installer | Feature | Description | |---------|-------------| | File Name | adksetup.exe (same as online installer) | | Behavior | When run with specific command-line parameters, it downloads the full .cab files locally before installing, creating an offline source. | | Typical Size | 1.5 GB – 5.5 GB depending on selected features (e.g., Windows PE is ~2.5 GB alone). | | Installation | No internet needed after the offline media is created. | | Supported OS | Windows 10/11, Windows Server 2016/2019/2022 (host), and targets Windows 10/11, Windows Server (depending on ADK version). | 3. How to Obtain a True ADK Offline Installer Microsoft does not provide a direct single-file offline download for the latest ADK versions via the public website. Instead, you must create the offline installer using the online setup with specific switches. Method 1: Using Command Line to Download Full Layout Run the online adksetup.exe with the /layout switch. This downloads all installation files to a specified folder without installing.