StartUp Windows 8 PC with CD/DVD Media
How Disabling Secure Boot and Boot from CD/DVD Installation Media on a PC with Microsoft Windows 8 Uefi usually Pre-Installed.
And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.
The Contents and Details of Windows 8 How to Disable Secure Boot for Linux Installation Give Focus Only to the Essentials Instructions and Commands and Make the Tutorial Easier to Read and Digest ;)
Booting from CD/DVD on a Windows 8 Computer