Login Screen hangs after entering password
- by Ravi
When I enter my password in the login box nothing happens. It gets stuck.  It was running fine earlier.  I have installed gnome-panel and cairo-dock, after which, I logged out, logged back in, and choose gnome classic session.  I also added a ppa from the webupd8.org to install the themes (link). 
I opened Ubuntu Tweak tool, and changed the theme to Evolve the whole laptop stopped responding.  The keyboard and mouse were unresponsive.  So I was forced to do a shut down.  Now whenever it starts, I cannot login into Ubuntu.  I hear the fan noise, as its spinning very fast, when the laptop freezes.(Probably the CPU is running at 100%).
Please help me. How can I login back to Ubuntu? I am using Ubuntu 12.04 and have installed all the latest updates..
EDIT: I want to know how can I delete a folder from the file system using the live CD?