I downloaded version 12.04 and have tried to boot it using the Wubi. It opens a plain screen with the word Ubuntu and five dots under it which change colour a couple of times. Then nothing. All I can do is restart - but the same happens.
I'm using a Dell Inspiron 1300 with Windows XP also on it. I've looked at other similar problems which may be due to the same cause but have no idea how to use command prompts etc to attempt a fix. Should I give up on Ubuntu?