in "login name" i have only the name of pc because i'm the only one to use it.
I'm afraid you don't know how computers work here, the name of a computer has no relevance to a login name, it doesn't matter if there is one user or 1000, users have names.
The folder i use to scanner in "Permissions for new folder" i have only "Everyone", i select all permissions but does not work.
So click add on that screen and add the username you use to log into the PC (assuming it has a password) or create a new user with a password and add it in there (Passwords are required for remote access, it doesn't matter if you don't need one to log into the PC itself, it is required to log in remotely from another client (PC,Printer etc)