there is a user group on xp named back up operators. look at the group descriptions and hopefully that will answer ur question. as for the hidden account i dont believe it exists. however i did find an account for microsoft to get into my pc as part of their "help" service that needless to say got deleted as soon as i stumbled upon it. go into computer management and local users and groups, this is on xp pro so as for other os's i dunno.
Fear is nothing but the anticipation of pain, be it physical, mental, spiritual or emotional.
Athlon XP 2200+ oc\'ed @ 1.93ghz
Nvidia mx420 :(
60gig maxtor 7200rpm
Dual boot with Mandrake 10.0 and Win XP Pro sp2