I hit an interesting little problem trying to download and use the developer version of MQ V9.1 for windows.
I downloaded the zip file on my Linux box, and extracted it onto my memory stick.
I rebooted into Windows 10, and tried to install MQ from the memory stick. I got various errors including error code 0x80004005, and “corrupt file” when trying to install Explorer.cab. If you unzip it on Windows, and install it from the memory stick, it works!