Desktop Management
3.5.5 Master Boot Record Security
The Master Boot Record (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 computer 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.
To enable MBR Security, complete the following steps:
1.Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.
2.As soon as the computer is turned on, press and hold the F10 key until you enter Computer Setup. Press Enter to bypass the title screen, if necessary.
✎If you do not press the F10 key at the appropriate time, you must turn the computer off, then on again, and press the F10 key again to access the utility.
If you are using a PS/2 keyboard, you may see a Keyboard Error
When MBR Security is enabled, the BIOS prevents any changes being made to the MBR of the current bootable disk while in
✎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.
Each time the computer is turned on or restarted, the BIOS compares the MBR of the current bootable disk to the previously saved MBR. If changes are detected and if the current bootable disk is the same disk from which the MBR was previously saved, the following message is displayed:
Press any key to enter Setup to configure MBR Security.
Upon entering Computer Setup, you must
■Save the MBR of the current bootable disk;
■Restore the previously saved MBR; or
■Disable the MBR Security feature.
You must know the setup password, if one exists.
If changes are detected and if the current bootable disk is not the same disk from which the MBR was previously saved, the following message is displayed:
Press any key to enter Setup to configure MBR Security.
Service Reference Guide, dc5000 |