So I'm trying to apply a boatload of updates and upgrades via Ubuntu's built-in update system… But it tells me the updates/upgrades can't be completed because it requires the installation of "untrusted" packages.
For the most part, my software has been installed via the Ubuntu Software Center… But there are a few odds and ends that I have installed separately…
The thing is, even the "Ubuntu base" updates (which as I understand it, as from Ubuntu themselves) are considered "untrusted" when I try to install them individually!
I've had a play around in the relevant settings, but no matter what I click, Ubuntu simply does not want to apply these updates/upgrades!
What am I doing wrong?