I would have to add, i had one time it would not start (black screen) but it mysteriously started again after i messed in recovery mode.
But i think was mistaken in that it did not work, you see, for some reason my screen goes black while loading. (Which is annoying; no feedback.)

Also while installing Ubuntu at my father. (Prospect convert ) The option dual install did not appear. Partitioning manually hit a small snag too, but it seemed that the partition table of this computer was wrong for some reason before i started Ubuntu. :s

I also had difficulties with my older computer, but it seems that it's hardware was just failing. (Only liveCDs dont crash, i used Damn Small Linux for a while there.)