Setup Cannot Locate Toolkit Documentation-x86-en-us.msi May 2026

Lack of local administrator rights or specific domain policies (like "Back up files and directories") can prevent the installer from creating the necessary temporary folders for these components. Step-by-Step Solutions 1. Run with Administrative Privileges

The error message typically occurs during the installation of the Windows Assessment and Deployment Kit (ADK) or the Microsoft Deployment Toolkit (MDT) . This specific file contains the logic and data required to install the toolkit's documentation components. Common Causes for the Error

Run the following command: adksetup /quiet /layout C:\ADKoffline setup cannot locate toolkit documentation-x86-en-us.msi

A partial or corrupted download of the primary adksetup.exe can lead to hash mismatches, preventing it from verifying or finding its sub-installers.

Security software can mistakenly flag the download or execution of these background installers as suspicious activity, causing the setup to halt. Lack of local administrator rights or specific domain

Once the download (roughly 1.6 GB to 3 GB) completes, navigate to C:\ADKoffline and run the adksetup.exe from there. 3. Disable Security Software Temporarily

If you are performing an offline installation, the error indicates that the Installers subfolder is missing the specific toolkit documentation-x86-en-us.msi package. This specific file contains the logic and data

If the error persists, temporarily disable your antivirus or web filter (e.g., Sophos, Windows Defender) during the installation process to ensure it isn't blocking the download of the .msi files.