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

The error "Setup cannot locate Toolkit Documentation-x86_en-us.msi" commonly occurs during the installation of the Windows Assessment and Deployment Kit (ADK). This typically happens because of corrupted download files, lack of internet access during an "online" installation attempt, or restricted folder permissions. Solutions to Fix the MSI Error

Uninstall Previous Versions: Remove older versions of Windows PE add-ons before installing newer ADK versions. setup cannot locate toolkit documentation-x86-en-us.msi

Expected result

• Installer should either:

  If the online installer is failing to find the file, stop fighting with your network. Download the full package on a machine with unrestricted internet access and move it over. The Command : Open a terminal as Administrator and run: adksetup.exe /layout C:\ADKoffline : Copy that ADKoffline folder to your target machine using a USB or network share. The Install ADKSetup.exe Installer should either: If the online installer is