Lenovo ThinkPad Edge E520 (English) User Guide - Page 138

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

Page 138 highlights

Security menu items Table 5. Security menu items Menu item Submenu item Password Selection UEFI Update Option Flash UEFI Updating by End-Users • Disabled • Enabled Memory Protection Execution Prevention • Disabled • Enabled Virtualization Intel Virtualization Technology • Disabled • Enabled I/O Port Access 120 User Guide Intel VT-d Feature Ethernet LAN Wireless LAN WiMAX Wireless WAN • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled • Disabled • Enabled Comments Refer to "Security menu" on page 114 and "Using passwords" on page 59. If you select "Enabled", all users can update the Flash UEFI. If you select "Disabled", only the person who knows supervisor password can update the Flash UEFI. 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 VMM (Virtual Machine Monitor) can utilize the additional hardware capabilities provided by Intel 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. If you select "Enabled", you can use the Ethernet LAN device. If you select "Enabled", you can use the Wireless LAN device. If you select "Enabled", you can use the WiMAX device. If you select "Enabled", you can use the Wireless WAN device.

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Security menu items
Table 5. Security menu items
Menu item
Submenu item
Selection
Comments
Password
Refer to “Security menu”
on page 114 and “Using
passwords” on page 59.
UEFI Update Option
Flash UEFI Updating by
End-Users
Disabled
Enabled
If you select “Enabled”,
all users can update the
Flash UEFI. If you select
“Disabled”, only the person
who knows supervisor
password can update the
Flash UEFI.
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.
Intel Virtualization
Technology
Disabled
Enabled
If you select “Enabled,”
a VMM (Virtual Machine
Monitor) can utilize the
additional hardware
capabilities provided
by Intel 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.
Ethernet LAN
Disabled
Enabled
If you select “Enabled”, you
can use the Ethernet LAN
device.
Wireless LAN
Disabled
Enabled
If you select “Enabled”, you
can use the Wireless LAN
device.
WiMAX
Disabled
Enabled
If you select “Enabled”, you
can use the WiMAX device.
Wireless WAN
Disabled
Enabled
If you select “Enabled”, you
can use the Wireless WAN
device.
I/O Port Access
120
User Guide