Table 3-4Computer Setup—Security (continued)

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

Enables/disables Master Boot Record (MBR) security.

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.

 

 

24 Chapter 3 Computer Setup (F10) Utility