for Windows XP
Control Panel->User Accounts-〉Change account->[your own account]-〉Related Tasks(in the left side menu)->Manage my network passwords->choose the one user which you wanna remove and press the "remove" button
then everything is ok
Control Panel->User Accounts-〉Change account->[your own account]-〉Related Tasks(in the left side menu)->Manage my network passwords->choose the one user which you wanna remove and press the "remove" button
then everything is ok