HP ProDesk 400 G2, Руководство по техническому обслуживанию и ремонту

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Table 6-3 Computer Setup—Security (continued)
● Accessory USB Ports
Slot Security Allows you to disable any PCI or PCI Express slot. Default is enabled.
Network Boot Enables/disables the computer’s ability to boot from an operating system installed on a network server.
(Feature available on NIC models only; the network controller must be either a PCI expansion card or
embedded on the system board.) Default is enabled.
System IDs Allows you to set:
● Asset tag (18-byte identifier), a property identification number assigned by the company to the
computer.
●
Ownership tag (80-byte identifier) displayed during POST.
● Universal Unique Identifier (UUID) number. The UUID can only be updated if the current chassis
serial number is invalid. (These ID numbers are normally set in the factory and are used to uniquely
identify the system.)
●
Keyboard locale setting for System ID entry.
Master Boot Record
Security
Enables/disables Master Boot Record (MBR) security.
The MBR contains information needed to successfully boot from a disk and to access the data stored on
the disk. Master Boot Record Security may prevent unintentional or malicious changes to the MBR, such
as those caused by some viruses or by the incorrect use of certain disk utilities. It also allows you to
recover the "last known good" MBR, should changes to the MBR be detected when the system is
restarted.
When MBR Security is enabled, the BIOS prevents any changes being made to the MBR of the current
bootable disk while in MS-DOS or Windows Safe Mode.
NOTE: Most operating systems control access to the MBR of the current bootable disk; the BIOS cannot
prevent changes that may occur while the operating system is running.
Restores the backup Master Boot Record to the current bootable disk. Default is disabled.
Only appears if all of the following conditions are true:
● MBR security is enabled
● A backup copy of the MBR has been previously saved
● The current bootable disk is the same disk from which the backup copy was saved
CAUTION: Restoring a previously saved MBR after a disk utility or operating system has modified the
MBR, may cause the data on the disk to become inaccessible. Only restore a previously saved MBR if you
are confident that the current bootable disk's MBR has been corrupted or infected with a virus.
System Security (these
options are hardware
dependent)
NOTE: Available options are displayed depending on system configuration.
Data Execution Prevention (enable/disable) - Helps prevent operating system security breaches. Default
is enabled.
Virtualization Technology (VTx) (enable/disable) - Controls the virtualization features of the processor.
Changing this setting requires turning the computer off and then back on. Default is disabled.
Virtualization Technology Directed I/O (VTd) (enable/disable) - Controls virtualization DMA remapping
features of the chipset. Changing this setting requires turning the computer off and then back on. Default
is disabled.
OS management of Embedded Security Device (enable/disable) - This option allows the user to limit OS
control of the Embedded Security Device. Default is enabled. This option is automatically disabled if
Trusted Execution Technology is enabled.
● Reset of Embedded Security Device through OS (enable/disable) - This option allows the user to
limit the operating system ability to request a Reset to Factory Settings of the Embedded Security
Device. Default is disabled.
78 Chapter 6 Computer Setup (F10) Utility