unable to get windows 8 comptuer to boot into live CD ubuntu 12.10

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http://askubuntu.com – I have an Asus X401A, brand new with Windows 8 on it. It malfunctions every single day that I want to smash it to pieces. And so I want to install Ubuntu. I burned a live CD Ubuntu 12.10, but when I restart the computer with the live CD inside the dvd drive, nothing happens, asus just boots into Windows. Why? (HowTos)