Hi Moonnique,

i finally solved my problem (i think...) !
Enabled built-in Administrator account and i'm using it as my own
and disabled all others.
The issue was created by windows defender and something called
WDAGUtilityAccount, which blocked a lot of changes even though i had administrator privileges...
I wasn't capable of removing its attributes from my common accounts, like i said before , i'm a complete idiot...

Well, it's working for now...
Just passing to give you feedback on my situation
and THANK YOU SO MUCH FOR YOUR TIME AND ENDLESS HELP !!!


Marcelo from Brazil.