Yeah, I can't say I'm enjoying the banality of it, in that there is no debate as such, not a single statement was rebutted on a technical level, and  emotional, personal attacks are hardly going to help you, or anyone in fact.
Anyway, moving on, I don't think you can roll back here, as you have nothing to roll back on, you've installed a newer win build.

OK, so some time has passed, you've been hard at it, how about a recap?

What is the current situation?

You're on 1803, you have a single GPU in the rig, drivers installed, debug on, can you post the log just before and after the hang?

Don't stress it man, you'll get it running.

Sorry man, I forgot to ask, where did you get your original Win10 install? Did you buy that rig perhaps?
What I mean is, could you maybe have your Win10 1607 install media kicking about somewhere?

That said, I'm not sure that 1803 is necessarily a dead duck for mining, clearly you had some issue right back at the start, that caused you to format and reinstall Win10, I'm just curious as to how your present situation compares with the original one.

What I mean is, that rig was stable, running some months as you said, then it broke, you've done a lot of work on the problem, is it still broke in the same way?

Could you have a hardware issue, is the question I have in my mind right now.

Indeed UFEI install is necessary if you plan on having multiple GPU in the rig, but it wouldn't prevent a single GPU halting claymore init, so considering your present situation, I'd set that aside for now, and focus on specific the issues as they present themselves now.