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[ubuntu] Image failed *ACCESS DENIED* installing on lenovo

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http://ubuntuforums.org – I just received an x1 carbon in the mail and have been trying to install ubuntu on it today. Whenever I try to boot from my usb image of ubuntu-12.04.1-desktop-amd64, I get a message saying "image failed to verify with **ACCESS DENIED**..". I tried disabling UEFI boot in bios with no luck. My usb image works fine on my pc and my other laptop. What is going on with my thinkpad? PS. if it helps, I noticed on the main tab of my bios it says "UEFI Secure Boot On". Do I need to change something in the security tab? (Hardware)