Lenovo THINKPAD L520 - Computer Stops Responding

•Thedefaultsettingsarealreadyoptimizedforyou.Ifyouconsiderchangingthecomputerconguration,
proceedwithextremecaution.Settingthecongurationincorrectlymightcauseunexpectedresults.
•Ineachsubmenu,youcanenableafunctionbyselectingEnabled,ordisableitbyselectingDisabled.
Thefollowingsubmenuisdisplayed:
•Password:Setapasswordrelatedfunctions.
•SecurityChip:Setthesecuritychiprelatedfunctions.
•BIOSUpdateOption:SpecifythesettingsforFlashBIOSupdate.
•MemoryProtection:SpecifythesettingsfortheDataExecutionPreventionfeature.
•I/OPortAccess:EnableordisabletheaccesstoindividualI/Oports.
•Computrace:EnableordisableBIOSinterfacetoactivateComputracemodule.
Tosetpasswordrelatedfunctions,gototheSecuritymenuandselectPassword.Thefollowingsubmenuis
displayed:
•UsingPassphrase
•SupervisorPassword
•LockBIOSSettings
•SetMinimumLength
•BIOSpasswordatunattendedboot
•Power-OnPassword
•HardDisk1Password
Note:HardDisk1meanstheharddiskdrivebuiltintoyourcomputer.
IfyouselectUsingPassphraseandenableit,youcansetapasswordcontainingupto64characters.
Fordetails,refertoUsingPassphrase.
LockBIOSSettingsenablesordisablesthefunctionthatprotectsitemsintheBIOSSetupUtilityfrom
beingchangedbyauserwhodoesnothavethesupervisorpassword.Bydefault,thissettingisdisabled.
Ifyousetthesupervisorpasswordandenablethisfunction,noonebutyoucanchangeanyitemsin
theBIOSSetupUtility.
IfyouselectSetMinimumLength,youcanspecifyaminimumlengthforpower-onpasswordsandhard
diskpasswords.Ifyousetthesupervisorpasswordandspecifyaminimumlengthforpasswords,noone
butyoucanchangethelength.
IfyouselectandenableBIOSpasswordatunattendedboot,apasswordpromptisdisplayedwhenthe
computeristurnedon,fromeitherapower-offstateorhibernation,byanunattendedeventsuchasWakeon
LAN.IfyouselectDisabled,nopasswordpromptisdisplayed;thecomputergoesaheadandloadsthe
operatingsystem.Topreventunauthorizedaccess,settheuserauthenticationontheoperatingsystem.
Startupmenu
Youmayneedtochangethestartupsequenceofyourcomputer.Forexample,ifyouhavedifferentoperating
systemsondifferentdevices,youcanhavethesystemstartupfromeitherofthem.
Attention:Afteryouchangeyourstartupsequence,youmustbeextremelycarefulnottospecifyawrong
deviceduringacopy,asave,oraformatoperation.Ifyouspecifyawrongdevice,yourdataandprograms
mightbeerasedoroverwritten.
140UserGuide