Lenovo ThinkPad E455 - Memory Module Problems; Networking Problems

Table3.Securitymenuitems(continued)
Menuitem
SubmenuitemSelectionComments
FlashBIOSUpdatingby
End-Users
•Disabled
•Enabled
IfyouselectEnabled,
alluserscanupdatethe
UEFIBIOS.Ifyouselect
Disabled,onlytheperson
whoknowsthesupervisor
passwordcanupdatethe
UEFIBIOS.
UEFIBIOSUpdateOption
SecureRollBackPrevention
•Disabled
•Enabled
Disabledisthedefault
valuewhenOSOptimisezd
issettoDisabled.Enabled
isthedefaultvaluewhen
OSOptimisezdisset
toEnabled.
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.
IntelVirtualization
Technology
•Disabled
•Enabled
IfyouselectEnabled,a
VirtualMachineMonitor
(VMM)canutilizethe
additionalhardware
capabilitiesprovidedby
VirtualizationTechnology.
Note:Thissub-menuis
availableonmodelswithan
IntelCPU.
IntelVT-dFeature•Disabled
•Enabled
IntelVT-disIntel
VirtualizationTechnology
forDirectedI/O.When
enabled,aVMMcanutilize
theplatforminfrastructure
forI/Ovirtualization.
Note:Thissub-menuis
availableonmodelswithan
IntelCPU.
Virtualization
68UserGuide