I think the problem is that some people simply will not ask for help with the computer, so they just guess and click randomly until they fix it or mess something else up. People seriously mess their machines up because they think, "the tech guy will always be able to fix it, might as well try on my own first," then they shout at you, "What kind of expert are you?!" when you can't work out what the hell they've done to mess their computer up so much.
I can't tell my sister anything about computers. She tells me to shut up and won't listen to any advice I try to give her. Stupid? No, insecure I'd say.
