Lenovo ThinkPad Edge E145 (English) User Guide - Page 106

Startup menu, Menu item, Selection, Comments, UEFI Only, Support, Disabled, Enabled, User Mode

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Table 5. Security menu items (continued) Menu item Submenu item Selection Secure Boot Secure Boot • Disabled (for the UEFI Only boot mode and No with the CSM Support) • Enabled Platform Mode Secure Boot Mode Reset to Setup Mode User Mode Standard Mode • Yes • No Restore Factory keys • Yes • No Comments Enable or disable the UEFI Secure Boot feature. The Windows 8 or Windows 8.1 operating system requires this feature to be enabled. If you select Enabled, your computer can prevent unauthorized operating systems from running at boot time. This option is used to clear the current platform key and put the system into the Setup mode. You can install your platform key and customize the Secure Boot signature databases in the Setup mode. Then, the Secure Boot mode will be customized. 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 the certificate for Windows 8 or Windows 8.1 operating system. Startup menu You might need to change the startup sequence of your computer. For example, if you have different operating systems on different devices, you can have the system start up from either of them. 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. Attention: 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. 90 User Guide

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Table 5. Security menu items (continued)
Menu item
Submenu item
Selection
Comments
Secure Boot
(for the
UEFI Only
boot
modeand
No
withthe
CSM
Support
)
•
Disabled
• Enabled
Enable or disable the UEFI
Secure Boot feature. The
Windows 8 or Windows 8.1
operating system requires
this feature to be enabled.
If you select
Enabled
,
your computer can prevent
unauthorized operating
systems from running at
boot time.
Platform Mode
User Mode
Secure Boot Mode
Standard Mode
Reset to Setup Mode
• Yes
• No
This option is used to clear
the current platform key
and put the system into the
Setup
mode.
Youcaninstallyourplatform
key and customize the
Secure Boot
signature
databases in the
Setup
mode.
Then, the
Secure Boot
mode will be customized.
Secure Boot
Restore Factory keys
• Yes
• No
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 the
certificate for Windows 8
or Windows 8.1 operating
system.
Startup menu
You might need to change the startup sequence of your computer. For example, if you have different
operating systems on different devices, you can have the system start up from either of them.
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.
Attention:
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.
90
User Guide