The Title above is the exact verbatim message provided by a SFTP putty login attempt, using a prior working WinSCP utility with all its settings unchanged.
I'm not sure I understand. So do you open PuTTY from WinSCP?
[b]Disconnected[/b]: no supported authentication methods available (server sent public key)
Was the message provided by WinSCP.
So can you login anyhow? Using any other SFTP/SSH tool?