I've been trying to install Ubuntu alongside windows 8.1 through a usb stick. I can boot into it just fine and it asks me if I want to install alongside windows 8.1. When I click on that it just reboots into 8.1 again. So then I tried installing using the "other options" selection. I can boot into the live CD mode and it works just fine, but I want it actually on my hard drive. From the tutorials I looked at I needed a free space partition so I shrunk my C drive by 20 gigs and it showed up as "Unallocated Space". As far as I know I need "free space" to install it and when I try to install it will not recognize my partition. I have a screenshot of what I am talking about.
PC is an HP Pavilion DV6, came with windows 7 installed.