Top 5 Best Antivirus 2018 We have used four criteria to evaluate each anti-virus product: PROTECTION: how comprehensive is the product i.e. protection against viruses, malware, spam, Internet, spyware and whether it provides anti-theft, anti-phishing, identity theft prevention, personal firewall and so on. SETUP: how easy is it to install, setup and use the product. DEVICES: number of devices...