Intel cannot prevent users from doing what they want with their Intel Compute Sticks but before installing any non-validated operating system, I would recommend that you check the following web site: http://www.intel.com/support/motherboards/desktop/sb/CS-035602.htm
True, but maybe that page needs an update since the Intel Downloads section offers 1 driver for Windows 8.1 64-bit and 3 drivers for Windows 10 32-bit. I get the policy and the reason it is published, but in one area you say "No" and in another you kind of say "Yes". It will lead to confusion among your customers when they come looking for drivers and see options beyond Windows 8.1 w/ Bing 32-bit.
I had the very same issue with Windows 10 clean install, but was able to resolve it by following @zeke's post and this link: Complete driver list for Windows 8.1 (which @zeke had provided). My procedure was as follows: When you do a clean installation of Windows 10, "load" the drivers provided at the Complete driver list for Windows 8.1 - one by one. For graphics and bluetooth, please download those for Windows 10. I did use the Intel embedded drivers for Windows 8.1, because I could not find those for Windows 10. (Frankly, I do not think that it makes much of a difference.) Please make sure that you select the apprpriate drivers for your hardware, because some packages contain multiple processor families. Even if you did not know the specifics, you could always fix these issues once you boot into the Windows desktop environment and going to the "device manager" and "updating" the drivers from the files downloaded fromComplete driver list for Windows 8.1. In my case, the bluetooth drivers had got screwed up, but I was able to fix them, after I uninstalled the offending "devices" and their drivers (screwed up due to installation of irrelevant UART drivers at the "load drivers" stage of the Windows 10 installation) from the device manager and rescanning the hardware and automatically (by then, the correct Windows 10 had already been installed through the "load driver" step) updating the drivers. I hope that this helps.
You may also want to check this out:
Re: Drivers provided for Compute Stick video/audio is not working, especially the August 06, 2015, 13:56 post by LACInfosys. And, be sure to update the BIOS to the latest before you install.
Thanks for helping others by providing your workaround for this issue.
The link Intel® Compute Stick — Supported Operating Systems clearly states which are the current supported Operating Systems for the Intel® compute stick.