Never mind, got it. Apparently the 4.3 version stranded the following files in /etc/init.d/, which once removed, allowed the install to proceed properly:
-rwxr-xr-x 1 root root 6796 Nov 21 2014 vboxautostart-service -rwxr-xr-x 1 root root 10140 Nov 21 2014 vboxballoonctrl-service -rwxr-xr-x 1 root root 12680 Nov 21 2014 vboxdrv -rwxr-xr-x 1 root root 9917 Nov 21 2014 vboxweb-service Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1617735 Title: virtualbox failed to install on upgrade from manual install virtualbox-4.3 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1617735/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
