Thanks for filing this bug in Ubuntu. There is something going on with your clamav-socket systemd unit it seems:
Preparing to unpack .../clamav-daemon_0.99.2+dfsg-0ubuntu0.16.04.2_amd64.deb ... Failed to stop clamav-daemon.socket: Unit clamav-daemon.socket not loaded. dpkg: warning: subprocess old pre-removal script returned error exit status 5 dpkg: trying script from the new package instead ... Failed to stop clamav-daemon.socket: Unit clamav-daemon.socket not loaded. dpkg: error processing archive /var/cache/apt/archives/clamav-daemon_0.99.2+dfsg-0ubuntu0.16.04.2_amd64.deb (--unpack): subprocess new pre-removal script returned error exit status 5 Could you please show us the output of the following commands: sudo ls -la /run/clamav/clamd.ctl sudo systemctl status clamav-daemon.service clamav-daemon.socket sudo systemctl stop clamav-daemon.service clamav-daemon.socket sudo ls -la /run/clamav/clamd.ctl sudo systemctl start clamav-daemon.service clamav-daemon.socket sudo systemctl status clamav-daemon.service clamav-daemon.socket sudo ls -la /run/clamav/clamd.ctl And then we will proceed from there. Thanks ** Changed in: clamav (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1718045 Title: package clamav-daemon 0.99.2+dfsg-0ubuntu0.16.04.1 failed to install/upgrade: subprocess new pre-removal script returned error exit status 5 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/clamav/+bug/1718045/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs