This can be closed. I solved my issue by deleting the user profile completely.

I get the same error as you, but I didn't change any password etc.

100% sure that's the only solution ?

I can't backup all my data and I don't want to lose it.

Hello, thanks for assisting me.

I followed the steps and I still get the same message :/

I get this message whenever I try to downgrade


There is NO other accounts, I already checked.
I also typed this in CMD just to make sure
"Net user administrator /active:no

HELP !!