BillytheImpaler said:It gave you that error when you went to start X?
If so try running
sudo dpkg-reconfigure xserver-xorg
sudo dpkg-reconfigure gdm
and see if that does anything.
EDIT: You might also try updating your system. From the command line run
sudo apt-get update
sudo apt-get upgrade
You'd then try to startx again.
Thanks for your help Billy but I have come to the assumption that my graphics card might be knackered because most of the live CDs don't work and crash on loading screens.