Lenovo X220 TABLET Tablet User Manual


 
Table 7. Security menu items (continued)
Menu item
Submenu item Selection Comments
Clear Security Chip
Enter
Clear the encryption key.
Note: Only if you select
“Active” for Security Chip,
this item appears.
Intel TXT Feature Disabled
Enabled
Enable or disable Intel
Trusted Execution
Technology.
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 supervisor
password can update the
UEFI BIOS.
UEFI BIOS Update Option
Flash Over LAN
Disabled
Enabled
Enable your computer's
UEFI BIOS to be updated
(ashed) over an active
network connection.
Memory Protection Execution Prevention Disabled
Enabled
Some computer viruses
and worms cause memory
buffers to overow 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
nd 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.
194 User Guide