My computer has a 250GB Hard Drive with 2 partitions, one of the partitions, the D: drive has 72GB of free space on it.I used the following installer, not the live-dvd, to install Ubuntu 12.04 LTS. <a href="http://www.ubuntu.com/download/help/install-ubuntu-with-windows">http://www.ubuntu.com/download/help/install-ubuntu-with-windows</a> The installer had a drop down menu that allowed me to select the 72 GB partition.