Ubuntu triple boot isn't working
Hey everyone, I was just trying to install Ubuntu as a triple boot on my desktop. I am doing this on a bootable USB Flashdrive and it is Ubuntu 14.04 the latest. My computer specs are 16GB ram, Intel Core I7-4770 CPU 3.40 GHz, NIVIDIA GeForce GTx 660, and MSI MS-7815. I'm trying to install this onto a external hard drive. I've tried the F6 options and it didn't get me anywhere. Help would be much appreciated, thanks.