Microsoft Account No longer Logging In To Windows 10 Xbox Apps EXCLUSIVELY (only)

Hello everyone,

I must admit I am at a loss and on the last few attempts I can think of concerning the subject above. To spare you much reading here's a bullet-description of the situation

-(10-14-2018) Bought Zoo Tycoon Ultimate Animal Collection through Microsoft store (on a refurbished desktop I purchased in 06-2018)

-Technical difficulties with game right off the bat- Invested in a 150$ graphics card a week later

-Windows 10 upgrade to version 1809 a few days later - and BAM new card useless. Windows no longer apparently recognizes my adaptors and drivers. Game crashes immediately. Labelled incompatible by a Level 2 Microsoft Tech support after a 4h phone conversation
and such. No signs of teredo's adaptors - no way of having them installed. was asked to roll back or reinstall windows cause apparently it was incomplete.

-Get ready for new installation but give one last go at Color Management which i Had missed (what would color have to do with a grame crashing) believe it or not, some profiles had disappeared and by re-adding these i was playing again! Reinstalling Windows
no longer required... until I played with my graphics card settings shortly after because quality wasn't as good as when I installed it and I BBQed my desktop. It wouldn't even boot anymore. Flash drive came in handy after all and after 4 or 5 days, everything
seems to be back to normal (but i havent been playing due to updates and reboots and etc) back in the game.

Wait for it... wait for it... yup! Because faith has a weird sense of humor, my curse kicks in AGAIN!

-Suddenly no longer able to connect into Xbox live/Xbox App/Insider hub with my Microsoft account... FOR A MONTH NOW! tried everything and anything I can find online (When I say everything, i mean EVERYTHING) reached out to communities, Xbox, microsoft again
for another 3h today... I even went as far as changed my online dating profile to "Desperate to make friends with a PC Connaisseur - am ready to pay!" but nobody knows why I cant log on to Xbox Live or any of its apps.

If you remember the title of my message, I said something about exclusivity. I kept thinking it was Teredo related, NAT Network type related because It was strict - moderate, blocked and would keep changing constantly. Until I tried something silly a week
ago. Converted a new email into a Microsoft Account and connected to the apps. Worked like a gem right off the bat. But that means I have to play from scratch.. possibly having to convert everything I own in life to this new email.

I wondered if my original account functioned at all period else where. And it does. Fabulously. I can connect through any web browser, Android App, and even borrowed my neighbors daughters Xbox 360 to play my original save file. That was 3 days ago and i
only found out this eve that the game is not compatible for 360s... -_-

Yup: original account connects to my xbox profile in every way except PC apps. and the apps work fine and let me play if i use a different account. This makes NO Sense at all to anybody. I am determined to play under my original account and will NOT let
any type of box tell me what I can and cannot do with it. We created them and should therefor be in control of them. I'm tempted to sacrifice my blow dryer in the tub as a threat or teaching it the laws of gravity from a third floor window. (I am only saying
that to express how this whole experience has been aggravating) I'm a nintendo and Sony Playstation type of guy. I don't even need to wonder why.

Any help and explanation AND A SOLUTION as to why I get "We couldn't sign you in to Xbox Live" - a specified logon does not exist. It may already have been terminated" with the option to try again or cancel.

How ever, if I click on "Not you?" at the top left and attempt to connect again with my faulty account, I see my gamer profile appear, welcoming me back and the "Lets play. button and then moment I click on that - back to nothing.

:)