I just got a new MacBookPro ( something like 2 months now ) and I have already tried to implement the basic protections ( activating the firewall, installing avast, using a password at login ). Few days ago, I had to travel and I was connected to a friend`s internet connection( at her apartment, straight from wifi router connected to her modem). For the two first days, things were smooth but the third day, before I went out for lunch, I switched off my Mac and when I came back and started it ... I was given the option to choose between two disks asking me from which one do I want to boot. I selected to boot from MacBookPro ( the other one was named Backup ). After complete loading, I was no more asked to enter my password and my session was presented to me. But normally, I should not get to the session without entering my password. I was still a bit confused, then I restarted the computer, and indeed it was no more asking for password. I am not sure whether someone touched my Mac though...I don`t find any reason why my fiend would have done that anyway. Later, I was trying to find whether something else has changed..., then I changed my password and activated identification at login. while I was explaining what happened to my friend, I restarted the computer and to my surprise, the field for the password fills up automatically, it is like someone is typing. I am confused and I don`t know what to do... anyone has an idea of what happened and what should be done, please let me know.