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Secure RollBack Prevention • Disabled • Enabled If you select Enabled, you can choose to flash to the previous version of the UEFI BIOS Memory Protection Execution Prevention • Disabled • Enabled Some computer viruses and worms cause memory buffers to overflow by running code where only data is allowed. If the Data Execution Prevention feature can be used with your operating system, then by selecting Enabled you can protect your computer against attacks by such viruses and worms. If after choosing Enabled you find that an program does not run correctly, select Disabled and reset the setting. Chapter 6. Advanced configuration 79 Table 6. Security menu items (continued) Menu item Submenu item Selection Comments Virtualization Intel Virtualization Technology • Disabled • Enabled If you select Enabled, a Virtual Machine Monitor (VMM) can utilize the additional hardware capabilities provided by Virtualization Technology. Intel VT-d Feature • Disabled • Enabled Intel VT-d is Intel Virtualization Technology for Directed I/O. When enabled, a VMM can utilize the platform infrastructure for I/O virtualization. Note: This submenu is not supported in models with an AMD CPU. Anti-Theft Intel AT Module Activation • Disabled • Enabled • Permanently Disabled Enable or disable the UEFI BIOS interface to activate the Intel AT module, which is an optional Anti-Theft service from Intel. Note: If you set the Intel AT module activation to Permanently Disabled, you will be unable to enable this setting again. Intel AT Suspend • Enter This option is displayed only when the anti-theft function is activated. The Intel anti-theft suspend screen will be displayed at next boot to enter the suspend mode. Computrace Module • Disabled Enables or disables the Activation • Enabled • Permanently Disabled UEFI BIOS interface to activate the computrace module. Computrace is an optional monitoring service from Absolute Software. Note: If you set the computrace module activation to Permanently Disabled, you will be unable to enable this setting again. 80 User Guide Table 6. Security menu items (continued) Menu item Submenu item Selection Comments Secure Boot Secure Boot • Disabled • Enabled Enable or disable the UEFI Secure Boot feature. Select Enable to prevent unauthorized operating systems from running at boot time. Select Disabled to allow any operating systems to run at boot time. Platform Mode • User Mode • Setup Mode Specify the system operating mode. Secure Boot Mode • Standard Mode • Custom Mode Indicates Secure Boot mode is standard mode or custom mode. Reset to Setup Mode This option is used to clear the current platform key and put the system into setup mode. You can install your own platform key and customize the Secure Boot signature databases in setup mode. Secure Boot mode will be set to custom mode. Restore Factory Keys This option is used to restore all keys and certificates in Secure Boot databases to factory defaults. Any customized Secure Boot settings will be erased, and the default platform key will be re-established along with the original signature databases including certificate for Windows 8 operating system. Startup menu You might need to change the startup sequence of your computer. To do so, select Startup from the ThinkPad Setup main menu. Attention: • After you change your startup sequence, you must be extremely careful not to specify a wrong device during a copy, a save, or a format operation. If you specify a wrong device, your data and programs might be erased or overwritten. • If you are using the BitLocker drive encryption, you should not change the startup sequence. BitLocker drive encryption detects the change of startup sequence and locks the computer from booting. Chapter 6. Advanced configuration 81 Changing the startup sequence Changing the startup sequence To change the startup sequence, do the following: 1. Select Boot; then press Enter. The default boot list is displayed, showing the order in which devices will be started up, even devices that are not attached to or installed on your computer are listed. • Use the Boot submenu to specify the startup sequence that runs when you turn on the power. . 2. Set the startup order by sing the following keys: • Use cursor keys to select a device. • Use F6 or the combination of Shift and + to move the device up to a higher priority. • Use F5 or – to move the device down to a lower priority. • Use the combination of Shift and ! to exclude or include a device. 3. Press F10 to save the changes and restart the system. To change the startup sequence temporarily so that the system starts up from a different drive, do the following: 1. Turn off the computer. 2. Turn on the computer; then, while the ThinkPad logo is displayed, press F12. 3. Select the device you want to start first. Note: To boot menu will be displayed when the system cannot boot from any devices or the operating system cannot be found. The following table lists the Startup menu items. Notes: • Default...
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