[ubuntu] Ubuntu crash. Help... Please?

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http://ubuntuforums.org – I have been dual-booting ubuntu 12.10 alongside windows 7. Recently, ubuntu froze for no apparent reason. I turned the computer off and turned it back on. Neither windows or ubuntu worked. I had to emercency wipe windows and fixed it, but whenever I started ubuntu, I just got the screen you see here https://www.dropbox.com/s/tu4jvtlf10...2021.55.58.jpg. I don't know what to do and I really want ubuntu back. Somebody help me arrrgh! (Hardware)