That is possibly due to Unity.
Boot in recovery mode and go to a shell.
Try to fix X
else
#sudo apt-get upgrade
#sudo apt-get check
#sudo apt-get -f install
Install a alternative desktop like kde, xfce etc
#sudo apt-get install xfce*
Best
A. Mani
--
A. Mani
ASL, CLC, AMS, CMS
http://www.logicamani.co.cc
sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update sudo apt-get install gnome-shellrestart the system.