When the Windows Assessment and Deployment Kit (ADK) installer throws the "Setup cannot locate toolkit documentation-x86-en-us.msi" error, it usually means your internet connection is being blocked, the installer is corrupted, or it's looking for 32-bit components that Microsoft has phased out in newer versions.
Don’t worry. This isn’t a sign that your hard drive is failing. It is a specific, well-known pathing issue related to Windows Installer caching. Here is why it happens and, more importantly, how to fix it. setup cannot locate toolkit documentation-x86-en-us.msi
If the basic steps do not work, consider these technical workarounds: Download and install the Windows ADK | Microsoft Learn When the Windows Assessment and Deployment Kit (ADK)
If the troubleshooter fails, the reference to the missing MSI must be manually removed. It is a specific, well-known pathing issue related
Download the latest version directly from the official Microsoft ADK download page .