Startup Menu - Lenovo ThinkPad S531 User Manual

Table 5. Security menu items (continued)
Menu item
Secure Boot

Startup menu

To change the computer startup settings, select Startup from the ThinkPad Setup main menu.
Attention:
• After you change the startup sequence, you must be extremely careful not to specify a wrong device
during a copy, save, or 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.
Changing the startup sequence
To change the startup sequence, do the following:
Submenu item
Secure Boot
Platform Mode
Secure Boot Mode
Reset to Setup Mode
Restore Factory keys
Selection Comments
module. Computrace is an optional
• Permanently
monitoring service from Absolute
Disabled
Software.
Note: If you set the computrace
module activation to Permanently
Disabled, you will be unable to
enable this setting again.
• Disabled Enable or disable the Secure Boot
feature. Select Enable to prevent
• Enabled
unauthorized operating systems
from running at boot time. Select
Disabled to allow any operating
systems to run at boot time.
• Setup Mode Specify the system operating mode.
• User Mode
• Standard Mode Specify the Secure Boot mode.
• Custom Mode
• Yes This option is used to clear the
current platform key and put the
• No
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.
• Yes This option is used to restore all
keys and certificates in Secure Boot
• No
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.
Chapter 7
.
Advanced configuration
79