Xbox App (Can't Sign In.) 01/15/2021

I'M CURRENTLY LOGGED INTO AN ADMIN
WINDOWS ACCOUNT.

I'VE TRIED EVERY WAY POSSIBLE TO TROUBLESHOOT, UPDATE, REPAIR, REINSTALL, CMD PRMPT, POWERSHELL CMD, EVERYTHING.

XBOX APP WILL NOT ALLOW ME TO SIGN IN TO MY
MICROSOFT ACCOUNT AT ALL.

I CLICK SIGN IN & NOTHING HAPPENS.

I GOTO SETTINGS, SHOWS I'M SIGNED INTO THE STORE, NOTHING HAPPENS WHEN I CLICK SIGN IN TO GAMES.

PREVIOUSLY, EVERYTHING WAS WORKING FINE.

THEN ONE DAY RECENTLY I WAKE UP, BOOT MY LAPTOP, AND MY LOCKSCREEN LOADED FINE, UNLOCKED MY SCREEN, & MY DESKTOP JUST FLASHED.

FOR WHATEVER REASON MY DESKTOP WOULDN'T LOAD AND THE LAPTOP WAS INOPERABLE.

SO I REINSTALLED WINDOWS 10, DELETED SYSTEM FILES, BUT KEPT PERSONAL USER FILES.

AT FIRST I HAD THE COMPLAICATIONS OF MY HARD DRIVE BEING CONFIGURED AS READONLY.

I COULDN'T EVEN INSTALL APPLICATIONS.

BUT, I'VE SINCE CORRECTED THAT PROBLEM.

NOW I'M ATTEMPTING TO REINSTALL & LOG BACK INTO ALL MY PROGRAMS FROM AN ADMIN USER ON WINDOWS.

I'M LOG BACK INTO MY ONLINE MICROSOFT ACCOUNT EVERYWHERE ELSE.

FOR SOME REASON THOUGH, XBOX APP IS THE ONLY PLACE THAT WON'T LET ME SIGN IN.

WEIRD THING IS... THAT IT DID. AT FIRST. BUT I LOGGED OUT TO SWITCH ACCOUNTS. NOW I CAN'T LOG BACK IN AT ALL.

I'VE TRIED EVERYTHING POSSIBLE AND DON'T WHAT TO DO?! I NEED HELP PLEASE!

I'M A MICROSOFT CERTIFIED TECHNICIAN IN WINDOWS OS FUNDEMENTAL OPERATIONS.

I'M TYPING IN ALL CAPS TO INDICATE MY STRESS LEVEL AS EVEN I CAN'T FIGURE THIS PROBLEM OUT.

:)