AVAST is a world-leading software developer when it comes to fast and effective antivirus solutions designed to fend off malware attacks while sparing system resources. It features four editions: avast! Free Antivirus, avast Pro Antivirus, avast! Internet Security and avast! Premier.

The first one is the most popular since it shares the antivirus, anti-spyware and anti-rookit engine along with the real-time guard with the paid editions.

Pro adds SafeZone, a feature designed to ensure secured payments and banking operations while navigating the Internet, while Internet Security throws an anti-spam module and silent firewall mode into the mix. Premier is the complete version, featuring extra tools for automatically keeping other programs updated, in addition to remote access and file shredder.