Lenovo ThinkPad Edge E135 (English) User Guide - Page 108

Menu item, Selection, Comments, Disabled, Enabled, UEFI BIOS Update Option, Memory Protection

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Table 5. Security menu items (continued) Menu item Submenu item Power-On Password Hard Disk1 Password UEFI BIOS Update Option Flash BIOS Updating by End-Users Selection • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled Memory Protection Secure RollBack Prevention • Disabled • Enabled Execution Prevention • Disabled • Enabled Virtualization AMD-V Technology • Disabled • Enabled Intel VT-d Feature • Disabled • Enabled Comments Refer to "Power-on password" on page 44. Refer to "Hard disk passwords" on page 44. If you select Enabled, all users can update the UEFI BIOS. If you select Disabled, only the person who knows the supervisor password can update the UEFI BIOS. If you select Disabled, you can flash the older version UEFI BIOS. 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 application program does not run correctly, select Disabled and reset the setting. If you select Enabled, a Virtual Machine Monitor (VMM) can utilize the additional hardware capabilities provided by Virtualization Technology. 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 sub-menu is not supported in models with an AMD CPU. 92 User Guide

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Table 5. Security menu items (continued)
Menu item
Submenu item
Selection
Comments
Power-On Password
•
Disabled
•
Enabled
Refer to “Power-on
password” on page 44.
Hard Disk1 Password
•
Disabled
•
Enabled
Refer to “Hard disk
passwords” on page
44.
Flash BIOS Updating by
End-Users
•
Disabled
•
Enabled
If you select
Enabled
,
all users can update the
UEFI BIOS. If you select
Disabled
, only the person
who knows the supervisor
password can update the
UEFI BIOS.
UEFI BIOS Update Option
Secure RollBack Prevention
•
Disabled
•
Enabled
If you select
Disabled
, you
can flash the older version
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 application program
does not run correctly,
select
Disabled
and reset
the setting.
AMD-V Technology
•
Disabled
•
Enabled
If you select
Enabled
,a
Virtual Machine Monitor
(VMM) can utilize the
additional hardware
capabilities provided by
Virtualization Technology.
Virtualization
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 sub-menu is not
supported in models with
an AMD CPU.
92
User Guide