I trying to install Ubuntu 12.04 LTS on Dell Vostro 3460, Intel Core i7-3632QM, 1TB SATA + 32GB SSDR mSATA.
My goal is to install dual boot (Windows 8 is already installed). After I boot from Ubuntu CD, I get the following screen:

(From this screen you can't define the disks and move forward with the installation.)