Heretofore, I have always used the default setup for Update Manager, that is, I have only installed the Level 1 and Level 2 updates.

A few days ago, when I saw that I had updates, I added Level 3 to those updates that I wanted installed - and pushed the button. In retrospect, since Level 3 updates are not tested, I no longer want them installed.

I have already unchecked the box for Level 3 updates, in Update Manager.

Now, is there a way to find and uninstall the Level 3 software that I installed?

Thanks, guys.

...but believed to be safe.

I wouldn't worry. I've left the defaults (Level I,II, and III) for 4 years, never had any issue with Level III updates.

I concur with Habitual. I've never had problems with any level 3 updates that I've installed.

By all means, go back to merely installing level 1 and 2 updates, if that's what you really want (although I would advise against this as important packages will become outdated), but don't worry about anything that you've already installed. The history facility in the update manager doesn't distinguish which level the updated package was, and the amount of research you would have to do to distinguish the level 3 updates already installed on your machine might be considerable, added to the fact that you would not be uninstalling said software, you would be rolling it back to previous versions.

This was the first time, since installing Mint 17.3 Cinnamon, that I have installed Level 3 updates, and to my recollection, there were only a few of them.

It's very reassuring to hear a voice of calm and reason amongst the din inside my head! Thank you, sir!

Please explain "as important packages will become outdated". Thanks.

All the update manager does is update existing software that exists on your machine. If you choose not to keep "level 3" software up to date then any software within that category will be held at their existing versions and will thus become outdated over time. This can be particularly problematic where updates include security-related changes.

https://sites.google.com/site/easyti...ager-explained

In real life, it's almost always fine to install level 4 and 5 updates too (I personally have these marked as Visible but not as Safe so that I can see what's available, and I always make a system backup before installing them just to be on the safe side). The levels are geared more towards naive users and are very much on the ultra cautious side. However they do make people think and that's a good thing.

Good stuff here, hydrurga. I bookmarked easytipsforlinux for future reference. Thanks so much.

No problem. I'm not sure how useful that site will be though. I chose the page in question because I felt it provided a fairly good summary of Mint's software update levels, but the other advice on the site seems very specific, related solely to issues uncovered by one person who's using Linux.

In saying that, there's a whole host of Linux Mint tips and advice out there on the internet. Enjoy!