[ubuntu] System broken after a crashed install.

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http://ubuntuforums.org – I would like to apologize if this has already been posted somewhere else but I did several searches and couldn't find anything useful. Anyway, I was having several issues with 12.10 (I would get 10-20 messages about there bieng an issue or applications crashing everytime I started the computer, several programs stopped working, I couldn't fix ppa's etc.) so I decided to try and reinstall 12.10 using a liveusb instead of the upgrade, however, the reinstallation crashed quite early in the process (I was just choosing my keyboard configuration); when I tried again there was no option to reinst (Hardware)