It looks like there may be an issue with the media from which you were
installing Ubuntu:

Jan 18 11:52:41 ubuntu apt-setup: 'Ubuntu 12.10 _Quantal Quetzal_ - Release 
amd64 (20121017.5)'
Jan 18 11:52:41 ubuntu apt-setup: Copying package lists...
Jan 18 11:52:41 ubuntu apt-setup: gpgv: no valid OpenPGP data found.
Jan 18 11:52:41 ubuntu apt-setup: gpgv: the signature could not be verified.
Jan 18 11:52:41 ubuntu apt-setup: Please remember that the signature file (.sig 
or .asc)
Jan 18 11:52:41 ubuntu apt-setup: should be the first file given on the command 
line.
Jan 18 11:52:41 ubuntu apt-setup: E: Sub-process gpgv returned an error code (2)
Jan 18 11:52:41 ubuntu apt-setup: W: Signature verification failed for: 
/cdrom/dists/quantal/Release.gpg
Jan 18 11:52:46 ubuntu ubiquity[15704]: Reverting lockdown of the desktop 
environment.
Jan 18 11:52:46 ubuntu activate-dmraid: No Serial ATA RAID disks detected
Jan 18 11:52:46 ubuntu apt-setup: warning: 
/usr/lib/ubiquity/apt-setup/generators/40cdrom returned error code 1; 
discarding output

I would check the disk for errors or try recreating the CD or USB media
again.

** Changed in: ubiquity (Ubuntu)
       Status: New => Incomplete

** Changed in: ubiquity (Ubuntu)
   Importance: High => Low

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https://bugs.launchpad.net/bugs/1101169

Title:
  Installer Crashed while installing Ubuntu in Sony Vaio E Series

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