In order to test my windows performance I did a clean boot as described here: https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows
Now Im not able to login using my PIN code and when using my microsoft account (I see my account`s avatar and full name) windows says its a "wrong password".
The password does work when checking my account via web browser( from other devices), I also did a password reset but still cant login.
I tried the safe mode with networking startup option but got the same result. The "wrong password" message appears instantly when hiting enter. It doesnt seem to check it online.