How to boot from CD or USB with a Windows 8 Computer
Here's how to access the settings in the UEFI (BIOS replacement) so that you can boot from a CD, USB Flash Drive, or other external storage. This was made with a Gateway laptop running Windows 8 but it should be similar with other brands.
Be careful making changes to the UEFI or BIOS.
If you have any questions, leave them in the comments.