All fail. That means there's a hardware issue or something quite rare where the BIOS has a keyboard regional setting.
Remember I take it that all through this you did the work and know about Windows nationalization and keyboard choices.
Ok, im listening. Are you suggesting i reinstall English(US) for Windows? Could it be so simple? What English region would not use a (,) or (<), or do you think what's installed is corrupted? Thank you, Im learning as I go.
I can only share what I would try short of a clean install.
There are web pages that show keyboard layouts so I'll not spend time on that (you could?)
My advice is to work the keyboard layout, region, see if SHARPKEYS can remove a mapping or just map it to the right key. I'm not there to do the work and can't tell you what is broken since I'm not there. However I can give you ideas about what I would try.
Remember I take it you tried all I noted and it failed so it's hardware.
So i looked at key remapping and decided on Key Tweak. https://keytweak.en.softonic.com/
It saw a remapping the instant it booted for the first time. So I restored defaults and BOOM! Now I wonder if my old mobo was bad, or the original keyboard for that matter...?HAHAHAHa ? Thank you very much!