I tried to install on a virtual PC, but I get a message that says the kernel requires and x86-64 CPU. It states that it detected an i686 CPU. The host machine is an AMD Phenom II x4 955.
Host OS: Windows 7 Ultimate 64-bit
Visualization software: Microsoft Virtual PC Version 6.0.156.0
Guest OS: ubuntu-12.04.3-desktop-amd64