Lenovo THINKPAD L520 - Solving Recovery Problems

DisablingthePassphrasefunction
TodisablethePassphrasefunction,usetheBIOSSetupUtilityasfollows.
Note:Beforeenablingordisablingthefunction,removethepower-on,allharddiskandsupervisor
passwords.Ifanypasswordisset,youcannotenableordisablethefunction.Refertotheprocedures
in“Power-onpassword”onpage70
,“Harddiskpasswords”onpage71,and“Supervisorpassword”
onpage73
1.Turnyourcomputeroff,andthenturnitonagain.
2.Whenthelogoscreenisdisplayed,pressF1.TheBIOSSetupUtilitywindowopens.
3.SelectSecurity,usingthecursordirectionalkeystomovedownthemenu.
4.SelectPassword.
5.SelectUsingPassphrase.
6.SelectDisabled.Anoticeisdisplayed,sayingthatthechangeshavebeensaved.
7.SelectContinue.
8.PressF10toexit.
9.IntheSetupConrmationwindow,clickY es.
EnablingthePassphrasefunction
ToenablethePassphrasefunction,usetheBIOSSetupUtilityasfollows.
Note:Beforeenablingordisablingthefunction,removethepower-on,allharddiskandsupervisor
passwords.Ifanypasswordisset,youcannotenableordisablethefunction.Refertotheprocedures
in“Power-onpassword”onpage70
,“Harddiskpasswords”onpage71,and“Supervisorpassword”
onpage73
1.Turnyourcomputeroff,andthenturnitonagain.
2.Whenthelogoscreenisdisplayed,pressF1.TheBIOSSetupUtilitywindowopens.
3.SelectSecurity,usingthecursordirectionalkeystomovedownthemenu.
4.SelectPassword.
5.SelectUsingPassphrase.
6.SelectEnabled.Awarningmessageisdisplayed,sayingthatifthePassphrasefunctionisenabled,
yourcomputerwillhaveonlylimitedinteroperabilitywithanycomputersthatarenotcompatiblewith
computersthatdonothavethatfunction.
7.SelectYes.
8.PressF10toexit.
9.IntheSetupConrmationwindow,clickY es.
Settingapower-onpassword,aharddiskpasswords,andasupervisorpassword
IfyouenablethePassphrasefunction,youcansetapasswordcontaining64characters.Tosetapassword,
youcanusealphanumericcharacterkeysandthespacebar.
Note:Ifthefunctionisdisabled,apower-onpasswordandaharddiskpasswordcancontainonly12
charactersandasupervisorpasswordcancontainonly7characters,allalphanumeric;youcannotusethe
spacebar.
Tosetapower-onpassword,harddiskpasswords,andasupervisorpassword,refertotheprocedures
in“Power-onpassword”onpage70
,“Harddiskpasswords”onpage71,and“Supervisorpassword”
onpage73.
Chapter4.Security69