Instead of running the small "web" setup file, you should download the entire ADK toolkit on a computer with a stable internet connection and then transfer it to your target machine. Run the ADK setup file ( adksetup.exe ).
How to Fix the Error: "Setup cannot locate toolkit documentation-x86_en-us.msi" setup cannot locate toolkit documentationx86enusmsi new
This will download all required .msi and .cab files, including the missing toolkit documentation, to a folder you specify. Instead of running the small "web" setup file,