Booting Ubuntu12.10 USB on Asus X401a Win8

This is my first time replacing an OS with Linux. I want to replace windows with Ubuntu 12.10 on my Asus X401a. The laptop does not have an optical drive so I need to use a USB stick.

I've read all the topics I can find on the topic of installing on this particular machine to no avail. It seems that no one has a problem getting the USB stick to boot.

I have written the iso to USB using Startup Disk Creator, I disabled safe-boot, and fast-boot on the laptop but when I enter the bios and tell it to boot from USB (UEFI: CBM) it still boots into Windows 8. I've tried disabling all boot options except USB and it just boots right back into the bios.

Any help would be greatly appreciated as I bought this laptop specifically to run Ubuntu.

Well, after much trial and error (and ignoring work and sleep) I figured out the proper settings in the bios. So here you go:

Under 'Security' disable 'Secure Boot Control'

Under 'Boot' disable 'Fast Boot', then enable 'Launch CSM', then enable 'Launch PXE OpROM'

Save changes and restart. On restart press the esc key and choose to boot from USB.