To check my PC is up to date on Windows 10 display drivers, I installed the “Intel Driver Update Utility”. After a quick scan, I was surprised to see I was apparently 5 major versions behind current!
So the 10.x software is dated quite recently - August 17th, 2015.
The 15.x software, though, is actually dated a few weeks earlier - 29th July 2015.
That makes a lot of sense. Both from Intel. Both drivers for “Intel HD Graphics”.
And once installed? I’ve downgraded to 10.18.10.4252 from 10.18.10.4276.
That was a waste of time.
Surprise, surprise, Windows Update has “Intel Corporation - Graphics Adapter WDDM1.0, Graphics Adapter WDDM1.1, Graphics Adapter WDDM1.2, Graphics Adapter WDDM1.3 - Intel(R) HD Graphics” waiting to install.