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

If you are trying to install or update software and hit the error you aren't alone. This is a common hiccup, usually occurring during the installation of Microsoft SQL Server or various developer toolkits.

When Windows attempts to install a feature, it consults a local cache (located in C:\Windows\Installer ). If the cached file is missing, corrupted, or if the original installation media (CD/DVD/ISO) is not present at the path stored in the registry, the installer prompts the user to locate the file manually with the error: "Setup cannot locate..." setup cannot locate toolkit documentation-x86-en-us.msi

: If you are on a computer without internet access, run the ADK setup on a machine with internet and select the option: "Download the Windows Assessment and Deployment Toolkit for installation on a separate computer" . Copy these files to your target machine and run setup again. If you are trying to install or update

The error message implies the file is missing. In most cases, it is actually present on your disk, but the installer is looking in C:\Users\[YourName]\AppData\Local\Temp\random-guid\ (deleted after a reboot) instead of your download folder. The setup provides no option to manually browse for the file—even though the MSI protocol supports this feature. This omission is an unforgivable UI failure. If the cached file is missing, corrupted, or

Here’s a concise draft feature request you can use to report “Setup cannot locate toolkit documentation-x86-en-us.msi.”