This question is in a familial context. The concerned people have only minimal knowledge to use their computer. I can't teach them anything security related.
In order to protect a user to install nasty extensions or drive-by downloads (fake "Java updates", etc..), I use parental controls on these computers with a very restricted list. The problem is that one user just ignores those dialogs (for example, Google Chrome Update won't run if not authorized by an admin), and for some reason, having these dialog open in the background actually makes the laptop overheat (fans start running in high speed after a few seconds after the UAC pops up, and remains open).
Now I'm concerned that instead of wasting my time (amongst other things) by installing malware, he will just damage his laptop by just not closing those dialogs.
Is there a way to just silently block those unauthorized programs, and maybe log those attempts somewhere (if this is not already done) ?