This is really weird. I just followed this tutorial:
http://ubuntuportal.com/2012/05/install-elementary-desktop-environment-in-ubuntu-12-04-lts.html
and it didn't work. My computer is all back to normal apart from the fact I have no minimise button. Yes I have searched but everyone is complaining about all the buttons. This is literally just minimise. Close is on the left, maximise is on the right and there is nothing else.