Hi...iam using Win XP Pro services pack2.
Before iam edit my user account, when i log in to windows ,i dont need press any password even it prompt n ask me for password,n i just press enter then i can access to windows.

after that, iam edit my user account using "control userpasswords2" in run, then i just unmark the " users must enter user name and password to use this computer" and restart the computer.

after restart ,i found windows ask me for administrator password, iam wondering and just press enter thinking to log in,but windows was come out a logon message saying " The system could not log you on.Make sure your User name and domain are correct ,then type your password again. Letters in passwords must be typed using the correct case" .

My computer have no any password for log on.

HELP. how do i back to the normal setting or what is the windows password for administrator?

Did you install Windows yourself or did it come installed on your computer? If you installed it yourself you would have had to set the password.

the computer NOT just install. and i have no set any password for my windows. i just edit the pop up screen in "control userpasswords2" there. then restart windows i get this error

If it prompts you for a password, then there must be one. Perhaps you made a mistake somewhere?

before i edit the user account in "control userpassword2" , i no need enter any password for my user , perhaps i have no set any password. after i unmark the " users must enter user name and password to use this computer" and restart the computer.
then it bcome this . and i have try repair windows and try log on to safe mode but still the same.