HP Dc7100 Computer Setup (F10) Utility Guide - Page 19

Computer Setup (F10) Utility Computer Setup (Continued) Heading Option Description Security (continued) Data Execution Prevention Enable/Disable Data Execution Prevention Mode helps prevent OS security breaches. ✎ This selection is in effect only if the processor and operating system being used comprehend and utilize Data Execution Prevention Mode. Master Boot Record Security Allows you to enable or disable Master Boot Record (MBR) Security. When enabled, the BIOS rejects all requests to write to the MBR on the current bootable disk. Each time the computer is powered on or rebooted, the BIOS compares the MBR of the current bootable disk to the previously-saved MBR. If changes are detected, you are given the option of saving the MBR of the current bootable disk, restoring the previously-saved MBR, or disabling MBR Security. You must know the setup password, if one is set. ✎ Disable MBR Security before intentionally changing the formatting or partitioning of the current bootable disk. Several disk utilities (such as FDISK and FORMAT) attempt to update the MBR. If MBR Security is enabled and disk accesses are being serviced by the BIOS, write requests to the MBR are rejected, causing the utilities to report errors. If MBR Security is enabled and disk accesses are being serviced by the operating system, any MBR change will be detected by the BIOS during the next reboot, and an MBR Security warning message will be displayed. ✎ Support for specific Computer Setup options may vary depending on the hardware configuration. Computer Setup (F10) Utility Guide www.hp.com 15