I wanted to dual boot my Windows 7 (x64) with Ubuntu 13.10 (x64). When I get to the stage when I select a partition, it says that Ubuntu does not detect any other operating system in my computer. I chose 'Something else' and the only partition that came up was 'free space' with 500 GB free space (my hard drive space). I set two partitions before installing Ubuntu. 414 GB for Windows 7 and 50 GB for Ubuntu.
My disk is not Dynamic.