HP EliteDesk 800 G1 Maintenance & Service Manual page 78

Slot Security
Network Boot
System IDs
Master Boot Record
Security
70 Chapter 6 Computer Setup (F10) Utility
Allows you to disable any PCI Express slot. Default is enabled.
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.
Allows you to set:
Asset tag (18-byte identifier), a property identification number assigned by the company to the
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computer.
Ownership tag (80-byte identifier) displayed during POST.
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Universal Unique Identifier (UUID) number. The UUID can only be updated if the current
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chassis serial number is invalid. (These ID numbers are normally set in the factory and are used
to uniquely identify the system.)
Keyboard Layout (language).
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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
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A backup copy of the MBR has been previously saved
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The current bootable disk is the same disk from which the backup copy was saved
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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.