Avast has one of the most popular antivirus apps around, due in part to offering a free version, and it's one that performs respectably. The company acquired
Lightweight, state-of-the-art protection that won't slow down your PC. Avast Free Antivirus has been redesigned to be easier to use while staying light on your PC. It offers proprietary, cutting-edge CyberCapture technology that finds and stops unknown files, as well as improved Wi-Fi Inspector which can identify even more weak points in your router. It also features SafeZone, the world's most secure browser, and an enhanced Game Mode which turns off background checks and updates to maximize your gaming experience.