Lenovo ThinkPad T420 4236 User Manual page 207

Table 9. Security menu items (continued)
UEFI BIOS Update Option
Memory Protection
Virtualization
I/O Port Access
Flash BIOS Updating by
End-Users
Flash Over LAN
Execution Prevention
Intel Virtualization
Technology
Intel VT-d Feature
Ethernet LAN
Wireless LAN
WiMAX
Wireless WAN
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
Chapter 8
If you select "Enabled",
all users can update the
UEFI BIOS. If you select
"Disabled", only the person
who knows supervisor
password can update the
UEFI BIOS.
Enable your computer's
UEFI BIOS to be updated
(flashed) over an active
network connection.
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.
.
Advanced configuration
189