Dell XPS 8500 manual Changing Boot Sequence for the Current Boot, 126

•CD/DVD/CD-RW Drive — The computer attempts to boot from the optical drive. If no disc is in the drive, or if the disc is not bootable, the computer generates an error message.

•USB Storage Device — Insert the memory device into a USB connector and restart the computer. When F12 Boot Options appears in the lower-right corner of the screen, press <F12>. The BIOS detects the device and adds the USB flash option to the boot menu.

NOTE: To boot to a USB device, the device must be bootable. To ensure that your device is bootable, check the device documentation.

•Network — The computer attempts to boot from the network. If no operating system is found on the network, the computer generates an error message.

Changing Boot Sequence for the Current Boot

You can use this feature to change the current boot sequence, for example, to boot from the optical drive to run Dell Diagnostics from the Drivers and Utilities disc. The previous boot sequence is restored at the next boot.

1If you are booting from a USB device, connect the USB device to a USB connector.

2Turn on (or restart) your computer.

3When F2 Setup, F12 Boot Options appears in the lower-right corner of the screen, press <F12>.

NOTE: If you wait too long and the operating system logo appears, continue to wait until you see the Microsoft Windows desktop. Then shut down your computer and try again.

The Boot Device Menu appears, listing all available boot devices.

4On the Boot Device Menu choose the device you want to boot from.

For example, if you are booting to a USB memory key, highlight USB Storage Device and press <Enter>.

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System Setup Utility