don't know much about Ubuntu but will try to be as specific as possible. After updating from 12.10 it auto-restarted, the screen went to black and froze there. I restarted it manually and got to the Grub menu. After trying a few things I went into Ubuntu Advanced Options, where it had the option to boot Ubuntu 3-8.0-19-generic or Ubuntu 3-5.0-27-generic, and recovery options for both. After selecting the 3-5.0-27-generic option (which I guess is an older kernel version) it went through several pages of code and then Unity started up. However,when I restart it freezes again. What can I do to get the updated kernel version working? Will be happy to provide any more information. Help really appreciated!
Did you try to update the system packages when you booted into 3.5.0-17? Also, could you post what is your graphic card? You can do that by posting the result of the command: