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

FIXED: "Setup Cannot Locate toolkit documentation-x86-en-us.msi" – Complete Guide

• Collect anonymized failure metrics to prioritize fixes.

If the main setup fails, you can sometimes install the missing component manually. Stack Overflow Navigate to the Installers subfolder within your ADK download directory. Toolkit Documentation-x86_en-us.msi and double-click it to install manually. Restart the main adksetup.exe to see if it now recognizes the installed component. 3. Registry Cleanup

• Open the Visual Studio Installer.
• Click on the three dots next to "Download" or "Install" and select "Repair."
• If available, try resetting the installer to its default state.

• Uninstalling Altium Designer – Older versions (e.g., Altium Designer 10, 14, or 15) often trigger this because the uninstaller looks for a legacy documentation MSI that was moved or deleted.
• Microsoft Visual Studio or .NET Framework clean-up – Older Visual Studio toolkits leave behind references to documentation MSI files.
• After manually deleting program folders – If you deleted a software folder instead of properly uninstalling it, the Windows Installer cache still thinks the documentation component exists.
• Corrupted Windows Installer cache – The C:\Windows\Installer folder may be missing critical cached MSI files.

Causes of the Error