After managing to sort out my partitions, I asked here, I tried installing and it asks me for a username and password, then it start installing.
About a quarter of the way through it says
Creating User..., then it crashes.
After the crash it opens a window with the title
problem in ubiquity and it says:
The problem cannot be reported. This is not an official Ubuntu package. Please remove any third party package and try again.
But I installed Ubuntu from their website, what is going on?
EDIT: I read this, and checked my disc and it's fine. So it' s not the problem...