Today suddenly an app called 'Avast' turned itself on. I did not voluntarily install it - it appears to have made its way onto my system somehow mysteriously last month, from the date I could see of when it was created on my system.
It had an uninstall function but that asked me for my password, and since I do not trust it and it abused me by installing itself without my knowledge, I did not want to give it my password. I also read on the net that the install function on it may not uninstall it completely - someone else apparently had a similar issue. Perhaps it is some illegal malware?
So I used the app 'AppCleaner' to try to uninstall it. However, after doing that, I could still see that it was running things, by using Activity Monitor. This made more distrust it even more. There were various processes running under the name 'Avast'.
So I tried using EasyFind to delete all files with Avast in the name. But, that did not let me! 'Move to trash' does nothing, and even 'Destroy' does nothing! So, since Finder cannot find any files named 'avast', I located them using EasyFind, and made it show one file in Finder - 'Avast', in Library/StagedExtensions/Applications. Then, I dragged that onto AppCleaner, to try to delete it like that. But AppCleaner said shows it with a padlock symbol, and doesn't let me delete it!
Here's a pic of the results from EasyFind, searching 'avant':

This makes me think someone put a lot of effort into forcing this onto me. Very abusive!
Googling 'how to delete avast mac' returns this as the top hit:
How to uninstall Avast for good?
This is an advert! Which tries to convince you to download CleanMyMac. Is that another malicious app? It seems to me likely that the whole purpose of this Avant app, aside from whatever malicious thing it may be doing to my system, is also aimed at forcing this other app upon us. I am disgusted.
Can someone advise me how to completely remove this app?
Thank you!