Vista - a wrong account

when I have installed "vista" I have used a account that then I have
removed, and in fact does not appear between my user accounts

currently i use two account, one as administrator, protected with password,
and the other as user

at the start I receive a signal of error of password before i have pressed a
key or used the mouse, and when I press the OK i see the account that I had
eliminated, and I must select "use another account" before being able to
approach my true accounts

on msc, in computer management, I have removed the old account; then i
have removed also the folder with this account from directory "users" but
nothing to do, at every restart i sees the wrong account

what can i do?

no more problems

accounts now are all right