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Menu Item Description
TPM Command
CAUTION: Clearing the TPM results in the loss of all keys in the
TPM. The loss of TPM keys may affect booting to the operating
system.
Clears all the contents of the TPM. By default, the TPM Clear option is set
to
No.
Intel TXT Enables or disables the Intel Trusted Execution Technology (TXT). To
enable Intel TXT, Virtualization Technology must be enabled and TPM
Security must be Enabled with Pre-boot measurements. By default, the
Intel TXT option is set to Off.
Power Button Enables or disables the power button on the front of the system. By
default, the Power Button option is set to Enabled.
NMI Button Enables or disables the NMI button on the front of the system. By default,
the NMI Button option is set to Disabled.
AC Power Recovery Sets how the system reacts after AC power is restored to the system. By
default, the AC Power Recovery option is set to Last.
AC Power Recovery Delay Sets how the system supports staggering of power up after AC power is
restored to the system. By default, the AC Power Recovery Delay option
is set to Immediate.
User Defined Delay (60s to
240s)
Sets the User Defined Delay when the User Defined option for AC Power
Recovery Delay is selected.
UEFI Variable Access Provides varying degrees of securing UEFI variables. When set to
Standard (the default), UEFI variables are accessible in the Operating
System per the UEFI specification. When set to Controlled, selected UEFI
variables are protected in the environment and new UEFI boot entries are
forced to be at the end of the current boot order.
Secure Boot Enables Secure Boot, where the BIOS authenticates each pre-boot image
using the certificates in the Secure Boot Policy. Secure Boot is disabled
by default.
Secure Boot Policy When Secure Boot policy is set to Standard, the BIOS uses the system
manufacturer’s key and certificates to authenticate pre-boot images.
When Secure Boot policy is set to Custom, the BIOS uses the user-
defined key and certificates. Secure Boot policy is set to Standard by
default.
Secure Boot Policy
Summary
Displays the list of certificates and hashes that secure boot uses to
authenticate images.
Secure Boot Custom Policy Settings screen
Secure Boot Custom Policy Settings is displayed only when Secure Boot Policy is set to Custom.
In the System Setup Main Menu, click System BIOS → System Security → Secure Boot Custom Policy
Settings
. The Secure Boot Custom Policy Settings screen details are explained as follows:
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