Hi everyone, I'm super annoyed and a bit worried: every time I reboot OS X El Capitan, the Guest User account appears in the login screen. No matter how many times I activate and deactivate the account in system preferences it shows up again when I reboot. Is anyone having a similar issue? Does anyone know how to fix it? I'm worried because this means that strangers can get access to my Macbook. I know they cannot access my files and etc etc but I don't want unauthorized people using my Macbook! MacBookPro11,3 OS X 10.11 Cheers!