Install Ubuntu over Windows 8

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http://askubuntu.com – I have bought a new Windows 8 laptop and the first thing I wanted to do was clear Windows 8 and start afresh with Ubuntu. I downloaded ubuntu-secure-remix-12.10-64bit.iso and created a bootable USB stick (couldn't boot from DVD) and then proceeded to install it on my laptop. I did not go for a dual boot (seemed little point as I would never use Windows). Now I get an error message when I restart after the installation process is complete (apparenty successfully): Secure Boot Image failed to verify with ACCESS DENIED. Press any key to continue. Now I am ever so slightly concerned I have (HowTos)