I'd hope that most of us have a general idea of what goes on in an automobile. We know that electricity is used to create sparks in the engine that explode gasoline, which was sprayed in by fuel injectors, and we know there's a coolant system with a water-pump and radiator. I don't do any work on my own car, but I'd know that I was being scammed if a repair shop said they needed to 'reverse the neutron flow'.:-)
OTOH, I really don't have clue what computer viruses and spy-ware do, even though I've been using computers for years and am a software engineer. But then, running Linux (and in the past, Unix), I've never had much need to find out.