Dell OptiPlex 390 Mini-Tower Owner's Manual

System Setup 18System SetupThis computer offers you the following options:• Access System Setup by pressing • Bring up a one-time boot menu by pressing Press to enter System Setup and make changes to the user-definablesettings. If you have trouble entering System Setup using this key, press when the keyboard LEDs first flash.Boot MenuThis feature gives users a quick and convenient mechanism to bypass theSystem Setup-defined boot device order and boot directly to a specific device(for example: floppy, CD-ROM, or hard drive).Keystroke Function one-time boot and diagnostics utility menu one-time boot and diagnostics utility menuBoot Menu EnhancementsThe boot menu enhancements are as follows:• Easier access — Although the keystroke still exists and canbe used to call up the menu, simply press during system boot toaccess the menu.• User prompting — Not only is the menu easy to access, when you areprompted to use the keystroke on the BIOS splash screen (see imagebelow). The keystroke is not "hidden".• Diagnostics options — The boot menu includes two diagnostic options, IDEDrive Diagnostics (90/90 Hard Drive Diagnostics) and Boot to the UtilityPartition. The benefit here is that you do not have to remember the and keystrokes (although they still work).NOTE: The BIOS features an option to disable either or both of the keystrokeprompts under the System Security / Post Hotkeys submenu.57