Friends, i used to leave my laptop a few times on a place where people i dont trust had access to. My laptop was protected with windows password but nothing else (no bios password or whatsoever). I have read that there are programs that can hack the machine through firewire port but my laptop doesn’t have any. Is it possible that someone could have installed something, maybe by using the UEFI (BIOS) or by using some bypass crack that wont remove the password (because if was reseted i would have had noticed) I have dell inspiron 15z ultrabook windows 8.1 64 bit Uefi bios system. Do i need to worry?