Last night I got a brand-new Retina MBP 15" Haswell 2.3GHz. Tonight I'm trying to set up Windows 8 Pro (from a full-version DVD on a USB SuperDrive) in Boot Camp in a 128GB partition. I enter my Windows key, the installer spends a few minutes getting to 100%, then it says: "Windows could not update the computer's boot configuration. Installation cannot proceed." I'm not the only person encountering this; see "https://discussions.apple.com/message/23509593". Has anyone been able to successfully install Windows 8 on a Haswell MacBook Pro?