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Table 5-3
Computer Setup—Security (continued)
Option
System Security (these
options are hardware
dependent)
Secure Boot
Configuration
Computer Setup—Power
NOTE:
Support for specific Computer Setup options may vary depending on the hardware configuration.
Table 5-4
Computer Setup—Power
Option
OS Power
Management
70
Chapter 5 Computer Setup (F10) Utility
Description
Virtualization Technology (VTx/VTd) (enable/disable). Controls the virtualization features of the processor.
Changing this setting requires turning the computer off and then back on. Default is disabled.
This is a feature of Windows 8.
●
Legacy Support—Enable/Disable. Allows you to turn off all legacy support on the computer, including
booting to DOS, running legacy graphics cards, booting to legacy devices, and so on. If set to disable,
legacy boot options in Storage > Boot Order are not displayed. Default is enabled.
●
Secure Boot—Enable/Disable. Allows you to make sure an operating system is legitimate before
booting to it, making Windows resistant to malicious modification from preboot to full OS booting,
preventing firmware attacks. UEFI and Windows Secure Boot only allow code signed by pre-approved
digital certificates to run during the firmware and OS boot process. Default is disabled, except for
Windows 8 systems which have this setting enabled. Secure Boot enabled also sets Legacy Support to
disabled.
●
Key Management—This option lets you manage the custom key settings.
–
Clear Secure Boot Keys—Don't Clear/Clear. Allows you to delete any previously loaded custom
boot keys. Default is Don't Clear.
–
Key Ownership—HP Keys/Custom Keys. Selecting Custom Mode allows you to modify the
contents of the secure boot signature databases and the platform key (PK) that verifies kernels
during system start up, allowing you to use alternative operating systems. Selecting HP Keys
causes the computer boot using the preloaded HP-specific boot keys. Default is HP Keys.
●
Fast Boot—Enable/Disable. Fast boot disables the ability to interrupt boot, such as pressing f keys to
access items before the operating system loads. Default is disabled.
NOTE:
If Windows 8 detects a serious error, it will interrupt the boot process automatically and
display advanced boot options.
From Windows 8, you can press
device or troubleshoot your computer.
Description
Runtime Power Management— Enable/Disable. Allows certain operating systems to reduce processor
●
voltage and frequency when the current software load does not require the full capabilities of the
processor. Default is enabled.
●
Idle Power Savings—Extended/Normal. Allows certain operating systems to decrease the processors
power consumption when the processor is idle. Default is extended.
Shift
and select Restart to access the screen that lets you boot to a
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