I have this really annoying problem, in msn messenger, when i was signing in, i ticked the sign in automatically button, my brothers use the computer as well, and they get in to my account because its on automatic sign in, this is very annoyin, i just wanna get rid of it, and go back too how it was, when i first installed msn messenger, can someone please help, it would be most appreciated, if its any help, i'm using msn messenger on Windows Xp.......

i even un-installed it, but its still the same. please help....