I have tried a couple forum posts that deal with this problem but have found no solutions. I am trying to install 13.10 on HP e9300z which has Windows 7 installed. I shrank my existing partition to create free space and then formatted it as ext4. I then reboot and run off the usb which has the iso. It boots to the installation screen fine and when I come to the installion type screen there are no partitions to select. The New partition button is grayed out and if i select the change, +, or - keys the install will freeze. If I select install now it tells me no root system is defined and to fix it in the partition table. The solutions I have looked up all seem to have extra steps in the installation program so I am unsure why mine is different. I tried removing dmraid but that did not change and thing. I've played around with different ways of formatting the partitions but have had no success. Anyone have any ideas?