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I've tried to boot from my Ubuntu 12.10 LiveUSB, but it will always gives me this:

Selected boot device has failed. Please reboot.

I've disabled secure boot and I put my USB as the first boot device but still no luck.

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how did you create the usb media? –  strings Jan 9 '13 at 1:01
Have you downloaded a different ISO file? Have you tried with other USB flash drive? –  Lucio Jan 9 '13 at 1:07
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