i just set up SGP on an intel compute stick (atom, 2nd gen) and it comes with 32-bit windows 10. AP mach1, SBIG STT-8300M, moonlite focuser and blue astro stick station - no problems (yet).
i agree that these forced upgrades are way beyond the pale. they may want to cut support but i'm sure they have millions upon millions of corporate customers who will not upgrade to W10 if they have stable W7 systems. MS is stuck with W7 even if every retail customer is forced to upgrade... as recently as 3 years ago my wife's employer was still requiring employees to run windows 2000!
rob