The username or password is not correct is the message I get duing installation of Thunderbird. But with the used password and username during the installation of Thunderbird, I can login in the webmail of my internetprovider. I checked the gates and general info with my emailproviders and they are set right in Thunderbird. Thunderbird worked last week great but after installing windows 10 again I can't get it to work.. I tryed to install Thunerbird on an other laptop and I got the same errormessage? I am stuck....