Table 6-3Computer Setup—Security (continued)

System Security

Data Execution Prevention (enable/disable) - Helps prevent operating system security breaches.

(these options are

Default is enabled.

hardware dependent)

SVM CPU Virtualization (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 (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.

 

Trusted Execution Technology (enable/disable) - Controls the underlying processor and chipset

 

features needed to support a virtual appliance. Changing this setting requires turning the computer

 

off and then back on. Default is disabled. To enable this feature you must enable the following

 

features:

 

●

Embedded Security Device Support

 

●

Virtualization Technology

 

●

Virtualization Technology Directed I/O

 

Embedded Security Device (enable/disable) - Permits activation and deactivation of the Embedded

 

Security Device.

 

NOTE: To configure the Embedded Security Device, a Setup password must be set.

 

●

Reset to Factory Settings (Do not reset/Reset) - Resetting to factory defaults will erase all

 

 

security keys and leave the device in a disabled state. Changing this setting requires that you

 

 

restart the computer. Default is Do not reset.

 

 

CAUTION: The embedded security device is a critical component of many security schemes.

 

 

Erasing the security keys will prevent access to data protected by the Embedded Security

 

 

Device. Choosing Reset to Factory Settings may result in significant data loss.

 

●

Measure boot variables/devices to PCR1 - Typically, the computer measures the boot path and

 

 

saves collected metrics to PCR5 (a register in the Embedded Security Device). Bitlocker tracks

 

 

changes to any of these metrics, and forces the user to re-authenticate if it detects any

changes. Enabling this feature lets you set Bitlocker to ignore detected changes to boot path metrics, thereby avoiding re-authentication issues associated with USB keys inserted in a port. Default is enabled.

114 Chapter 6 Computer Setup (F10) Utility

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