I'm not exactly sure why, but manually installing python 3 fixed the issue for me..
`sudo apt-get install python3` After that `sudo dpkg --configure -a` ran just fine without any issues. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1471460 Title: package python3 3.4.3-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python3-defaults/+bug/1471460/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs