Dell™ OptiPlex™ GX620 Systems User's GuideNotes, Notices, and CautionsAbbreviations and AcronymsFor a complete list of abbreviations and acronyms, see the Glossary.If you purchased a Dell™ n Series computer, any references in this document to Microsoft® Windows® operating systems are not applicable.Information in this document is subject to change without notice.© 2005–2006 Dell Inc. All rights reserved.Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.Trademarks used in this text: Dell, the DELL logo, OptiPlex, Inspiron, Dimension, Latitude, Dell Precision, DellNet, TravelLite, Dell OpenManage, PowerVault, Axim, PowerEdge, PowerConnect,and PowerApp are trademarks of Dell Inc.; Intel, Pentium, and Celeron are registered trademarks of Intel Corporation; Microsoft, MS-DOS, and Windows are registered trademarks ofMicrosoft Corporation; IBM is a registered trademark of International Business Machines Corporation; Bluetooth is a trademark owned by Bluetooth SIG, Inc. and is used by DellInc. under license. ENERGY STAR is a registered trademark of the U.S. Environmental Protection Agency. As an ENERGY STAR partner, Dell Inc. has determined that this productMini Tower ComputerFinding InformationBefore You BeginRecommended ToolsTurning Off Your ComputerBefore Working Inside Your ComputerChassis Intrusion SwitchRemoving the Chassis Intrusion SwitchReplacing the Chassis Intrusion SwitchResetting the Chassis Intrusion DetectorMini Tower ComputerAbout Your Mini Tower ComputerInside Your ComputerMini Tower Computer SpecificationsRemoving the Computer CoverI/O PanelDrivesPCI and PCI Express Cards and Serial Port AdaptersPower SupplyProcessorAdvanced FeaturesLegacySelect Technology ControlManageabilitySecurityPassword ProtectionSystem SetupBooting to a USB DeviceClearing Forgotten PasswordsClearing CMOS SettingsHyper-ThreadingPower ManagementBatteryReplacing the BatteryReplacing the System BoardMemoryDDR2 Memory OverviewAddressing Memory With 4-GB ConfigurationsRemoving MemoryReplacing/Adding Additional MemoryReplacing the Computer CoverCleaning Your ComputerReinstalling Drivers and the Operating SystemDriversUsing Microsoft® Windows® XP System RestoreReinstalling Microsoft Windows XPSolving ProblemsBattery ProblemsDrive ProblemsKeyboard ProblemsLockups and Software ProblemsMemory ProblemsMouse ProblemsNetwork ProblemsPower ProblemsPrinter ProblemsRestoring Default SettingsSerial or Parallel Device ProblemsSound and Speaker ProblemsVideo and Monitor ProblemsMicrosoft® Windows® XP FeaturesTransferring Information to a New ComputerUser Accounts and Fast User SwitchingSetting Up a Home and Office NetworkGlossaryTroubleshooting Tools and UtilitiesDell DiagnosticsSystem LightsDiagnostic LightsBeep CodesError MessagesResolving Software and Hardware IncompatibilitiesGetting HelpTechnical AssistanceProblems With Your OrderProduct InformationReturning Items for Warranty Repair or CreditBefore You CallContacting DellWarrantyFCC Notices (U.S. Only)NOTE: A NOTE indicates important information that helps you make better use of your computer.NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.