HP EliteBook 745 Maintenance and Service Guide - Page 114

Using HP Sure Start (select models only), Reset Security to Factory Defaults

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4. What kind of configuration data is stored on the DIMM Serial Presence Detect (SPD) memory module? How would this data be written? The DIMM SPD memory contains information about the memory module, such as size, serial number, data width, speed/timing, voltage, and thermal information. This information is written by the module manufacturer and stored on an EEPROM. This EEPROM cannot be written to when the memory module is installed in a computer. Third-party tools do exist that can write to the EEPROM when the memory module is not installed in a computer. Various third-party tools are available to read SPD memory. 5. What is meant by "Restore the nonvolatile memory found in Intel-based system boards"? This message relates to clearing the Real Time Clock (RTC) CMOS memory that contains computer configuration data. 6. How can the BIOS security be reset to factory defaults and data erased? IMPORTANT: Resetting will result in the loss of information. These steps will not reset Custom Secure Boot Keys. See question and answer 7 for information about resetting the keys. a. Turn on or restart the computer, and then press esc while the "Press the ESC key for Startup Menu" message is displayed at the bottom of the screen. b. Select Main, and then select Reset Security to Factory Defaults. c. Follow the on-screen instructions. d. Select Main, select Save Changes and Exit, and then follow the on-screen instructions. 7. How can the Custom Secure Boot Keys be reset? Secure Boot is a feature to ensure that only authenticated code can start on a platform. If you enabled Secure Boot and created Custom Secure Boot Keys, simply disabling Secure Boot will not clear the keys. You must also select to clear the Custom Secure Boot Keys. Use the same Secure Boot access procedure you used to create the Custom Secure Boot Keys, but make the selection to clear or delete all Secure Boot Keys. a. Turn on or restart the computer, and then press esc while the "Press the ESC key for Startup Menu" message is displayed at the bottom of the screen. b. Select the Security menu, select Secure Boot Configuration, and then follow the on-screen instructions. c. At the Secure Boot Configuration window, select Secure Boot, select Clear Secure Boot Keys, and then follow the on-screen instructions to continue. Using HP Sure Start (select models only) Select computer models are configured with HP Sure Start, a technology that continuously monitors your computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start restores the BIOS to its previously safe state, without user intervention. Those select computer models ship with HP Sure Start configured and enabled. HP Sure Start is configured and already enabled so that most users can use the HP Sure Start default configuration. The default configuration can be customized by advanced users. To access the latest documentation on HP Sure Start, go to http://www.hp.com/support. Select Find your product, and then follow the on-screen instructions. 104 Chapter 13 Statement of memory volatility

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4.
What kind of
configuration
data is stored on the DIMM Serial Presence Detect (SPD) memory
module? How would this data be written?
The DIMM SPD memory contains information about the memory module, such as size, serial number,
data width, speed/timing, voltage, and thermal information. This information is written by the module
manufacturer and stored on an EEPROM. This EEPROM cannot be written to when the memory module is
installed in a computer. Third-party tools do exist that can write to the EEPROM when the memory
module is not installed in a computer. Various third-party tools are available to read SPD memory.
5.
What is meant by “Restore the nonvolatile memory found in Intel-based system boards”?
This message relates to clearing the Real Time Clock (RTC) CMOS memory that contains computer
configuration
data.
6.
How can the BIOS security be reset to factory defaults and data erased?
IMPORTANT:
Resetting will result in the loss of information.
These steps will not reset Custom Secure Boot Keys. See question and answer 7 for information about
resetting the keys.
a.
Turn on or restart the computer, and then press
esc
while the “Press the ESC key for Startup Menu”
message is displayed at the bottom of the screen.
b.
Select
Main
, and then select
Reset Security to Factory Defaults
.
c.
Follow the on-screen instructions.
d.
Select
Main
, select
Save Changes and Exit
, and then follow the on-screen instructions.
7.
How can the Custom Secure Boot Keys be reset?
Secure Boot is a feature to ensure that only authenticated code can start on a platform. If you enabled
Secure Boot and created Custom Secure Boot Keys, simply disabling Secure Boot will not clear the keys.
You must also select to clear the Custom Secure Boot Keys. Use the same Secure Boot access procedure
you used to create the Custom Secure Boot Keys, but make the selection to clear or delete all Secure
Boot Keys.
a.
Turn on or restart the computer, and then press
esc
while the “Press the ESC key for Startup Menu”
message is displayed at the bottom of the screen.
b.
Select the
Security
menu, select
Secure Boot
Configuration
, and then follow the on-screen
instructions.
c.
At the
Secure Boot
Configuration
window, select
Secure Boot
, select
Clear Secure Boot Keys
, and
then follow the on-screen instructions to continue.
Using HP Sure Start (select models only)
Select computer models are
configured
with HP Sure Start, a technology that continuously monitors your
computer's BIOS for attacks or corruption. If the BIOS becomes corrupted or is attacked, HP Sure Start
restores the BIOS to its previously safe state, without user intervention. Those select computer models ship
with HP Sure Start
configured
and enabled. HP Sure Start is
configured
and already enabled so that most
users can use the HP Sure Start default
configuration.
The default
configuration
can be customized by
advanced users.
To access the latest documentation on HP Sure Start, go to
support
. Select
Find your
product
, and then follow the on-screen instructions.
104
Chapter 13
Statement of memory volatility