This is a Dell laptop - I shouldn't be having these issues.
I have the same issue with an Intel NUC. At first, I was excited about getting the "latest and greatest" from Microsoft. I tried many things, all without success. Nobody is able to say, "this is what is causing your problem." That is the reason nobody has been able to say, for certain, how to fix it. It's all been alchemy up to this point.
I'm ready to say I'm stuck with Windows 10 - which, after all, is working just fine except for the constant attempts to upgrade. Maybe all I can hope for is a way to stop the upgrade cycle.