Dell Power Supply C8000 Owner's Manual page 108

Option
Change Supervisor
Change User Password
Prevent Back-flash
(Disabled default)
108
Using the System Setup Program
Description
You can install a Supervisor password, and if you install a
supervisor password, you can then install a user password.
A user password does not provide access to many of the
features in the Setup utility. Note, the Change User
Password option only appears after a Supervisor password
has been set.
Select this option and press <Enter> to access the sub
menu, a dialog box appears which lets you enter a
password. You can enter no more than six letters or
numbers. Press <Enter> after you have typed in the
password. A second dialog box asks you to retype the
password for confirmation. Press <Enter> after you have
retyped it correctly. If the password confirmation is
incorrect, an error message appears. The password is stored
in NVRAM after ezPORT completes. The password is
required at boot time, or when the user enters the Setup
utility.
Installs or changes the User password.
This option, when enabled, will prohibit the system BIOS
to downgrade to version 2.1.0 or earlier version.
WARNING:
You will not be able to change the setting once
the feature is enabled. It is strongly recommended not
to enable this unless absolutely necessary.
NOTE:
Once enabled, you cannot use the NVRAM clear
jumper to change the prevent back-flash settings to
disabled.