The installer encountered an unrecoverable error and will now reboot
Follow these steps to fix the problem:
TRY Ubuntu from USB or CD
-
Open terminal, and type:
sudo apt-get remove ubiquity-slideshow-ubuntu Start the installation
It seems likely that your installation media is corrupted--in my experience, that's the most common cause of this kind of installation error.
You should MD5 test the .iso image you downloaded. If that doesn't check out, then you'll have to download a new .iso and start over.
If it does check out, then you should check the installation media for defects. This applies to both CD/DVD media and to USB flash drives.