Okay, SketchUp Make 2016 32- and 64-bit don’t fix it.
I have also installed the earliest NVIDIA driver I can find, from 2015, one from early 2016, the one currently supplied on the Dell website, and back to the very latest. No effect. I have also tried updating the Intel drivers to the latest supplied by Dell, and by forcing an install of the latest from Intel. Again, no luck. In both cases trying 32- and 64-bit version where available.
I think It’s time to give up!