[ubuntu] 12.10 & Windows 7 dual boot issue

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http://ubuntuforums.org – I've just put together a new computer that I want to dual boot 12.10 and Windows 7. This machine has a Gigabyte 78LMT-S2P motherboard, AMD video onboard, AMD CPU. My HDD is 500GB, so I'm not lacking for space. I am using Windows 7 professional 64 bit and Ubuntu 12.10 64 bit. This is my first use of EFI, but I have installed many dual boot systems. I'd like to use EFI, if possible, because I see installing a >2TB drive in the future. On this machine I have been able to install fully functional Windows 7 and 12.10 separately, but I cannot seem to be able to install a dual boot. Every t (Hardware)