ThinkPad E555 User Manual page 88

Table 4. Security menu items (continued)
Menu item
UEFI BIOS Update Option
Memory Protection
72
User Guide
Submenu item
Power-On Password
Set Minimum Length
Hard Disk X Password
Flash BIOS Updating by
End-Users
Secure RollBack Prevention
Execution Prevention
Selection
• Disabled
• Enabled
• Disabled
• x characters
(4≤x≤12)
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
• Disabled
• Enabled
Comments
Select Disabled to hide
the POST 0199 error and
proceed without any user
action required.
Refer to "Power-on
password" on page 53.
Specify a minimum length
for power-on password
and hard disk passwords.
If you set the supervisor
password and specify
a minimum length for
passwords, no one but you
can change the length.
Refer to "Hard disk
passwords" on page
55.
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.