ThinkPad E555 - Page 88

Table4.Securitymenuitems(continued)
Menuitem
SubmenuitemSelectionComments
SelectDisabledtohide
thePOST0199errorand
proceedwithoutanyuser
actionrequired.
Power-OnPassword
•Disabled
•Enabled
Referto“Power-on
password”onpage53
.
SetMinimumLength
•Disabled
•xcharacters
(4≤x≤12)
Specifyaminimumlength
forpower-onpassword
andharddiskpasswords.
Ifyousetthesupervisor
passwordandspecify
aminimumlengthfor
passwords,noonebutyou
canchangethelength.
HardDiskXPassword•Disabled
•Enabled
Referto“Harddisk
passwords”onpage
55
.
FlashBIOSUpdatingby
End-Users
•Disabled
•Enabled
IfyouselectEnabled,
alluserscanupdatethe
UEFIBIOS.Ifyouselect
Disabled,onlytheperson
whoknowsthesupervisor
passwordcanupdatethe
UEFIBIOS.
UEFIBIOSUpdateOption
SecureRollBackPrevention
•Disabled
•Enabled
IfyouselectDisabled,you
canflashtheolderversion
UEFIBIOS.
MemoryProtectionExecutionPrevention•Disabled
•Enabled
Somecomputerviruses
andwormscausememory
bufferstooverflowby
runningcodewhereonly
dataisallowed.Ifthe
DataExecutionPrevention
featurecanbeusedwith
youroperatingsystem,then
byselectingEnabledyou
canprotectyourcomputer
againstattacksbysuch
virusesandworms.Ifafter
choosingEnabledyoufind
thataprogramdoesnotrun
correctly,selectDisabled
andresetthesetting.
72UserGuide