Lenovo I53427U180SSD, X1 manual Startup menu, Menu item Submenu item Selection Comments Secure Boot

Table 6. Security menu items (continued)

Menu item	Submenu item	Selection		Comments
Secure Boot	Secure Boot	•	Disabled	Enable or disable the
		•	Enabled	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	Specify the system
		•	Setup Mode	operating mode.
	Secure Boot Mode	•	Standard Mode	Indicates Secure Boot
		•	Custom Mode	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