Update here on December 19th.
For the last 18 days the original laptop I was having issues with was rebuilt with the default Windows 10 install. Everything went well until the 18th, with no crashes, when I installed 2 graphics driver updates, consecutively, suggested by the Dell Support Assist app.
I did these installs consecutively, which is never a good idea. Before each install I created a restore point. I have done a restore to the second of the 2 graphics driver installs. I’ll now test on this first driver update and see what happens.
I’ll post the details of the model and it’s parts shortly.