#c6t571j-595b This computer system, #c6t571j-595b, is protected by a password authentication system. you cannot access the data on this computer without the correct password

SOURCE: password authentication system

here is your answer http://www.fixya.com/support/r3656360-dell_portable_computer_bios_hard_drive

SOURCE: This computer system #34pcw91-595b is protected by

this is ur password l1q35dg0 thanks if okie just give me vote [email protected]

Testimonial: "Sim Is a Great Man for Unlocking Laptops Password. Thanks sim"

SOURCE: Dell inspiron 1545. Service tag(S/N):

go to biosremoval.com they can help, works for me every time.
my laptop had bios password hard drive password and windows password. which was unlocked using bios removal services from biosremoval.com

SOURCE: This computer system, #hqhd3bs-595b is protected by apassword authentication system you can not access the data on this computer how i remove password

find dell bios password, hard drive password at biosremoval.com
note that bios passwords are different from hard drive password,
bios = unlock dell motherboard HDD = hard drive unlock
some computers may have up to 3 passwords being the last one windows passwords.