Lenovo ThinkPad E555 User Manual page 88

Table 4. Security menu items (continued)
Menu item
UEFI BIOS Update Option
Memory Protection
Virtualization
72
User Guide
Submenu item
Flash BIOS Updating by
End-Users
Secure RollBack Prevention
Execution Prevention
Intel Virtualization
Technology
Intel VT-d Feature
AMD-V™ Technology
Selection
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
Comments
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 a 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.
Note: This sub-menu is
only supported in models
with an Intel CPU.
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
only supported in models
with an Intel CPU.
When you select Enabled,
a VMM can utilize the
additional hardware
capabilities provided
by AMD Virtualization
technology.