The only way to remove LMCE is to reinstall from scratch, formatting your partition.
Instead of reseting your computer, hit Ctrl-Alt-F7 to see if you can get back to the ubuntu desktop.
Try running the AV Wizard. sudo /usr/pluto/bin/AVWizard_Run.sh
Look at /etc/X11/xorg.conf.pluto and see if it is using the same driver as in /etc/X11/xorg.conf
That's all I can think of just now. Some details about your hardware could be helpfull to others.