password startup problem

Im running Home premium. When I boot up, the first password screen I see
tells me "the user name or password is incorrect" . I click Ok and it takes
me to the 2nd page which is the usual password request page. I input here and
gain access to the desk top ok.
How do I stop the first page from appearing as it seems a bit pointless.
All help gratefully received. Best wishes for the season to all helpers &
readers
--
mike