72 System Setup UtilityNOTE: To boot to a USB device, the device must be bootable. To ensure thatyour device is bootable, check the device documentation.• CD/DVD/CD-RW Drive — The computer attempts to boot from theoptical drive. If no disc is in the drive, or if the disc is not bootable,the computer generates an error message.Changing Boot Sequence for the Current BootYou can use this feature to change the current boot sequence, for example, toboot from the optical drive to run Dell Diagnostics from the Drivers andUtilities disc. The previous boot sequence is restored at the next boot.1 If you are booting from a USB device, connect the USB device to a USBport.2 Turn on (or restart) your computer.3 When F12 Boot Options options appears in the lower-right corner ofthe screen, press .NOTE: If you wait too long and the operating system logo appears, continue to waituntil you see the Microsoft Windows desktop. Then shut down your computer andtry again.The Boot Priority Order menu appears, listing all available boot devices.4 On the Boot Priority Order menu choose the device you want to bootfrom.For example, if you are booting to a USB memory key, highlightUSB Storage Device and press .Changing Boot Sequence for Future Boots1 Enter system setup. See "Entering System Setup" on page 67.2 Use the arrow keys to highlight the Boot menu option and press to access the menu.NOTE: Write down your current boot sequence in case you want to restore it.3 Press the up- and down-arrow keys to move through the list of devices.4 Press plus (+) or minus (–) to change the boot priority of the device.