Hello,
Is it because you forgot the password? Since you are using local user to sign in, you will need to answer the security questions if they have ever been set up, or use a password recovery USB if you have made one prior to this.
Otherwise, there's no other way around this. It works as expected. Any attempt to bypass this is considered potential hacking and it can get anyone banned here in the forum.
I am sorry, but you do need to backup your files using the standard user, and perform a clean install Windows in that case.