Appendix 109Using the System Setup ProgramOverviewNOTE: Your operating system may automatically configure most of the options available in system setup,thus overriding options that you set through system setup. (An exception is the External Hot Key option,which you can disable or enable only through system setup.) For more information on configuringfeatures for your operating system, see the Windows Help and Support Center. To access the WindowsHelp and Support Center, see page 12.The system setup screens display the current setup information and settings for your computer,such as:• System configuration• Basic device-configuration settings• System security and hard-drive password settings• Power management settings• Boot (start-up) configuration and display settings• Docking-device settings• Wireless control settingsNOTICE: Unless you are an expert computer user or are directed to do so by Dell technical support, donot change the system setup settings. Certain changes might make your computer work incorrectly.Viewing the System Setup Screens1 Turn on (or restart) your computer.2 When the DELL™ logo appears, press immediately. If you wait too long and theWindows logo appears, continue to wait until you see the Windows desktop. Then shut downyour computer and try again.System Setup ScreenThe system setup screen consists of three windows of information. The window on the leftcontains an expandable hierarchy of control categories. If you select (highlight) a category (suchas System, Onboard Devices, or Video) and press , you can show or hide the relatedsubcategories. The window on the right contains information about the category or subcategoryselected in the window on the left.Altitude (maximum):Operating –15.2 to 3048 m (–50 to 10,000 ft)Storage –15.2 to 10,668 m (–50 to 35,000 ft)Environmental (continued)