HP ProDesk 600 G4 Micro Maintenance and Service Guide - Page 105

Password security and resetting CMOS

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8 Password security and resetting CMOS This computer supports security password features, which can be established through the Computer Setup Utilities menu. This computer supports two security password features that are established through the Computer Setup Utilities menu: administrator password and power-on password. When you establish only an administrator password, any user can access all the information on the computer except Computer Setup. When you establish only a power-on password, the power-on password is required to access Computer Setup and any other information on the computer. When you establish both passwords, only the administrator password will give you access to Computer Setup. When both passwords are set, the administrator password can also be used in place of the power-on password as an override to log in to the computer. This is a useful feature for a network administrator. If you forget one or both passwords, you can clear all passwords by powering off the system, opening the cover, temporarily removing the CLR_PSWD jumper, and booting once. This will erase the administrator and power-on passwords. You must restore the jumper to create new passwords. The computer's configuration memory (CMOS) stores information about the computer's configuration. The CMOS jumper resets CMOS but does not clear the power-on and setup passwords. CAUTION: Resetting the CMOS with power removed will reset the BIOS settings to factory defaults. It may be useful to back up the BIOS settings or save them as custom defaults before resetting them in case they are needed later. Back up can be performed in Computer Setup or using the BiosConfigUtility tool available from www.hp.com. See Computer Setup (F10) Utility on page 52 for information on backing up the BIOS settings. Resetting CMOS resets BIOS settings to default, but does not clear the passwords or affect any of the other Security settings. On Intel systems with advanced manageability features, resetting CMOS will also partially unprovision AMT. CAUTION: Stringent security is a mode where there is no physical bypass of the password function. If enabled, removing the password jumper will be ignored. To enable this mode, change the security setting Clear Password Jumper in Password Policies to Ignore. If you lose or forget the password when in stringent security mode, the system can only be reset by System Management Command. This is a way for HP Service and Support to provide a secure method to access the BIOS and command a password reset for a specifically identified unit under the direction of the owner. This scenario may not be covered under warranty. To prevent needing a customer service event to restore access to the system, record your configured administrator and power-on passwords in a safe place away from your computer. NOTE: You will receive POST error messages after clearing CMOS and rebooting advising you that configuration changes have occurred. Use Computer Setup to reset any special system setups along with the date and time. CAUTION: It is important to back up the computer CMOS settings before resetting them in case they are needed later. Back up is easily done through Computer Setup. See Computer Setup (F10) Utility on page 52 for information on backing up the CMOS settings. 97

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8
Password security and resetting CMOS
This computer supports security password features, which can be established through the Computer Setup
Utilities menu.
This computer supports two security password features that are established through the Computer Setup
Utilities menu: administrator password and power-on password. When you establish only an administrator
password, any user can access all the information on the computer except Computer Setup. When you establish
only a power-on password, the power-on password is required to access Computer Setup and any other
information on the computer. When you establish both passwords, only the administrator password will give you
access to Computer Setup.
When both passwords are set, the administrator password can also be used in place of the power-on password
as an override to log in to the computer. This is a useful feature for a network administrator.
If you forget one or both passwords, you can clear all passwords by powering off the system, opening the cover,
temporarily removing the CLR_PSWD jumper, and booting once. This will erase the administrator and power-on
passwords. You must restore the jumper to create new passwords.
The computer’s configuration memory (CMOS) stores information about the computer’s configuration.
The CMOS jumper resets CMOS but does not clear the power-on and setup passwords.
CAUTION:
Resetting the CMOS with power removed will reset the BIOS settings to factory defaults. It may be
useful to back up the BIOS settings or save them as custom defaults before resetting them in case they are
needed later. Back up can be performed in Computer Setup or using the BiosConfigUtility tool available from
www.hp.com. See
Computer Setup (F10) Utility
on page
52
for information on backing up the BIOS settings.
Resetting CMOS resets BIOS settings to default, but does not clear the passwords or affect any of the other
Security settings. On Intel systems with advanced manageability features, resetting CMOS will also partially
unprovision AMT.
CAUTION:
Stringent security is a mode where there is no physical bypass of the password function. If enabled,
removing the password jumper will be ignored. To enable this mode, change the security setting
Clear Password
Jumper
in Password Policies to
Ignore
.
If you lose or forget the password when in stringent security mode, the system can only be reset by System
Management Command. This is a way for HP Service and Support to provide a secure method to access the BIOS
and command a password reset for a specifically identified unit under the direction of the owner. This scenario
may not be covered under warranty.
To prevent needing a customer service event to restore access to the system, record your configured
administrator and power-on passwords in a safe place away from your computer.
NOTE:
You will receive POST error messages after clearing CMOS and rebooting advising you that configuration
changes have occurred. Use Computer Setup to reset any special system setups along with the date and time.
CAUTION:
It is important to back up the computer CMOS settings before resetting them in case they are needed
later. Back up is easily done through Computer Setup. See
Computer Setup (F10) Utility
on page
52
for
information on backing up the CMOS settings.
97