Are you been presented with your email summary
in windows XP user login screen ??
e.g "The Administrator Have 11 unread in firstname.lastname@example.org"
or simple " 3 unread messeges "
This thing Occurs with your "MSN Messenger" login..
So here is the way to get rid of it..
1. Goto Run and Type " control userpasswords2 " and Hit Enter
2. Now User Accounts Screen is DIsplayed Goto Advance Tab.
3. Press Manage Passwords and Remove the Shared User Id.
Now if again the problem persists Try Removing Your Inrernet History and cookies