Cannot update system Elementary OS 7 Horus

[Rudderhead]

In AppCenter, when I try to system update, it says "dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem". In terminal, when I use that command, I get:

"sudo ······································:~$ sudo dpkg --configure -a
[sudo] password for rudderhead:
dpkg: dependency problems prevent configuration of packagekit-tools:
packagekit-tools depends on packagekit (= 1.2.5-2ubuntu3); however:
Package packagekit is not installed.

dpkg: error processing package packagekit-tools (--configure):
dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of gstreamer1.0-packagekit:
gstreamer1.0-packagekit depends on packagekit (= 1.2.5-2ubuntu3); however:
Package packagekit is not installed.

dpkg: error processing package gstreamer1.0-packagekit (--configure):
dependency problems - leaving unconfigured
Errors were encountered while processing:
packagekit-tools
gstreamer1.0-packagekit"

I presume that means I need to install packagekit? Do I use dpkg to get it? And do I have to then install it? Not very clued up I'm afraid. Boomer :) Any help mucho appreciated.

[jeremypw]

packagekit and packagekit-tools should already be installed by default. You can run apt search packagekit to see related packages and whether they are installed. If not you can install each missing one with sudo apt install <package-name>.