Thanks for this additional information. If this is still happening, could you please run: $ sudo pycentral -v pkginstall update-manager $ sudo pycentral -v pkginstall update-manager-core
and attach the output to this bugreport? Thanks, Michael ** Changed in: update-manager (Ubuntu) Status: Fix Committed => Needs Info -- [apport] update-manager crashed with ImportError in <module>() https://launchpad.net/bugs/81991 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs