Which Ubuntu version should I use for my HP Envy Ultrabook? Is there any specific Ubuntu version recommended for ultrabooks? Because when I installed Ubuntu 10.04 and 11.04, the process could not identify my disk. And when I installed Ubuntu 12.04 using Wubi, I could not switch back and forth between Ubuntu and Windows because after switching back from windows to Ubuntu, a command prompt was shown with some unknown error. I need to use Linux for my daily work. So any help would be really appreciated.