[deanhills]

Thanks for the suggestion @ikk157. I decided that I will do without MalwareBytes for now so I can make sure first that that is the real source of the problem. I'll give it a few days first to make sure the pop up error message doesn't come up again. If MalwareBytes is the real source of the problem, I will only load it for once-off scanning when I really need to scan my computer properly. And then remove it afterwards.