So far on family's computers, and some friends, I usually just put Avast! free and Malwarebytes on for on-demand scans. Sadly I know Avast! doesn't stop everything, and they usually fail to run scans with MBAM. I would like to know if there is a better free setup for the "average user" which I would define as: - Middle-aged people whose only knowledge includes going online, doing email, typing documents. No knowledge of computer security other than knowing they need an antivirus. - Teenagers and young adults who frequently go online, especially to Facebook, who click on ads and links, and who use FrostWire or uTorrent, because they're "safer" than LimeWire, and despite telling them they will get infected, they don't want to give up free music. - Elderly people who rarely use the computer but who are gullible to social engineering and can't handle to learn anything complex. So I need a good, free, easy-to-use setup for the types of users described above, who need something that just works, is quiet, and requires little-to-no user interaction and maintenance. Your opinions are much appreciated!