Eset Smart Security V.4.0, 3 User [Old Version] ThreatSense technology uses multiple layers of threat detection to deliver the most effective protection possible against attacks ESET Smart Security is lightning fast, so fast you won't even notice it's there ESET Smart Security is lean and mean, using just 48 MB of memory From its compact and intuitive user interface to its minimal use of alerts, self-training two-way firewall, And other new features, ESET Smart Security is easier to use than ever before And intelligently scans compressed files to find threats that other products miss