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I get 'boot failure: proper digital signature was not found. One of the files on the selected boot device was rejected by the secure boot feature.'

Is this a common problem?

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First try with Secure Boot enabled and UbuntuSecureRemix. If that fails disable Secure Boot as stated below. – Karan Jan 21 '13 at 19:45

Check in your BIOS settings for secure boot and disable that. You should be able to enter BIOS by pressing some key (e.g. F2 - see your startup screen) at startup.

see Is there any way to pass through Secure Boot and install linux? for more info.

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