The Norton Security Deluxe protects your computers and smartphones against viruses and malware. It's generally not worth the full price, but $20 for a year-long, five-device subscription makes the purchase very tempting. Norton is best for protecting against what are known as zero-day hacks, which is basically when a hacker takes advantage of a weakness in software that the vendor doesn't know about yet. In these instances, Norton is often able to catch it quicker than the operating systems can update. Important note! This subscription automatically renews, so if you decide it's not worth it for you after all, you'll need to actively cancel it. $20.