HP 2230s - Compaq Business Notebook Guidelines

7
6. How Preboot BIOS Implements the Password Filter And
Handles Dead Keys
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TheHPBIOSimplementsasecondlevelpasswordfiltertofurtherpreventthe
lock‐outsituation.
HPBIOSPrebootandHPDriveEncryptioncontainthekeyboardmappingsfor
allthesupportedkeyboardslistedabove.WhenauserissettingupPreboot
SecuritywiththeBIOSPrebootorDriveEncryptionlevelsenabled,orwhena
userchangeshis/herpassword,theBIOSPrebootandDriveEncryption
receivestheUnicodepasswordfromtheOS.TheBIOSisresponsibleto
guaranteethatthekeyboardbeingassociatedwiththatuserisabletotypethe
password.Otherwise,theBIOSwillrejectthepassword.However,therestill
maybeaninstancewheretheuserchangesthekeyboardinWindowswithout
theBIOS’sknowledgeorwhentheuserisnotawareofthekeyboardlayout
currentlyinuse.Tocompensateforthesituationwheretheusermaynotbe
abletophysicallytypetheirpasswordduetothesetwosituations,theBIOSwill
automaticallyprovidetheusertheabilityto“click”outher/hispasswordafter
failingwiththephysicalkeyboard.Thisisdonebyshowingeverycharacteron
thescreenthatcouldbetypedwiththekeyboardcurrentlyassociatedwiththe
user,eachofthemasbuttonsandwhichcanbeclickedwiththemousetoform
thepassword.Thismethodprovidesawayfortheusertoenterthepassword
withoutthephysicalkeyboard.
(Pleasenote:Whenusingthe“On‐ScreenKeyboard”intheBIOS,therearemanycharactersshownandsomecharacters
maylookverysimilartoothersonsomekeyboards.Ifexperiencingtroubleusingthisfeature,sopleaselookatallof
thecharactersbeforeclickingoutyourpasswordtoensureyouareenteringthecorrectcharacters.)
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IntheBIOS,theuseofDeadKeyshasalsobeenaddedtotrytoprovidetheuser
withasmuchkeyboardfunctionalityaspossible.Ifforsomereasonacertain
characterisproducedontheOSlevelthatcannotbetypedintheBIOS,thiswill
causethepasswordchangetoberejected.Unlessrejected,theusershouldfeel
safeandconfidentinusingDeadKeysforpasswordsassociatedwiththe
PrebootSecurityfeature.
ThisabilityofthePrebootSecurityhingesonitsabilitytoensurethatthe
WindowspasswordcanalwaysbeenteredinthePrebootBIOSandDrive
Encryption,andthereforeallcharactersthatrequirespecialtypingmethods
thatarenotcommontoallkeyboards,suchastheuseoftheKanakeyortheuse
ofIMEfunctionofWindows,willresultinthepasswordchangebeingrejected
fromtheBIOS,astheBIOSdoesnotcontaintheseadvancedtypingfeatures.
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HP 2230s - Compaq Business Notebook Specifications

General

Processor	Intel Core 2 Duo
RAM	Up to 4 GB DDR2
Operating System	Windows Vista Business
Battery	6-cell Lithium-Ion
Screen Resolution	1280 x 800
Storage	Up to 250GB HDD
Graphics	Intel GMA X3100
Weight	1.59 kg
Chipset	Intel GM965 Express
Optical Drive	DVD±RW
Wireless	802.11a/b/g
Bluetooth	Bluetooth 2.0
Audio	High Definition Audio
Ports	3 USB 2.0, VGA, RJ-45, headphone/microphone jacks
Card Reader	5-in-1
Webcam	Optional