Linux Mint GUI Errors

[Benanov]

No Public Key sounds like a package repository issue.

I've had no issues with Ubuntu and Mint (at some point, maybe not now?) was based on Ubuntu.

Can you post a screenshot of what's going on?

Also can I get a screenfetch? ( https://github.com/KittyKatt/screenFetch ) - run this script and copy/paste or screenshot the results.

I run WINE in a terminal instance, so that might be a decent way of getting error messages. (I love the one where it's like "client is exiting for some reason..." - yeah that reason is because I mashed ESC because I wanna quit.)