So, maybe this would make things clearer...
Is Microsoft pushing a new Windows 10 release currently ? By dates, not vague terms like "recently" or "soon" ?
Is Modern Setup Host a Microsoft application/utility/whatever ?
If so, what is it used for ? What would cause it to spring to life and take over most of the CPU, network and disk ?
If not, do you know what it is, what it's used for, who's responsible for it, and any ill effects from stopping/removing it ?
If it *is* a Microsoft thing, are there any ill effects from stopping/removing it ? What *are* the expected results from it ?
Is Modern Setup Host used for multiple things (other app updates, emergency patches, etc) or just for Windows updates ?
In other words, instead of the usual vague "how to troubleshoot a problem that's probably unrelated to the problem you're having" Microsoft advice, how about speaking *directly* to the problem ?