The first line of defense for non-tech savvy people against online threats is to use common sense and avoid doing anything that could harm their online security. There is no software that can fully protect us from human stupidity.

We may (and should) use antivirus software in our computers, but this doesn’t change the fact that our computers are still managed by the same human beings who do stupid things. Antivirus software doesn’t protect us from social engineering. Attackers can infiltrate systems with simple e-mails, phishing scams or social engineering phone calls, to name a few, that fool users into giving away their credentials.
The only way to avoid dangerous situations in cyberspace is by being very vigilant. Users should be aware of how to protect themselves from potential dangers and refrain from clicking on suspicious e-mails or clicking on malicious links in messages.

When in doubt, don't click!