If you have a hunch about where the file might be (or if it's been downloaded previously), use your operating system's search functionality to look for toolkit_documentation_x86_en-us.msi .
The error is a classic legacy software issue. While the message appears esoteric, it almost always boils down to a missing or inaccessible documentation MSI file. By running the installer as administrator, extracting all files locally, cleaning up previous installations, or editing the MSI with Orca, you can bypass or fix the problem. setup cannot locate toolkit documentationx86enusmsi new
Third-party antivirus programs often block background downloads required by Microsoft installers. Temporarily software. If you have a hunch about where the