AVG Anti-Virus Free Edition 2011 is the latest version of AVG's popular malware detector.

At the program's heart is a strong core antivirus engine, which monitors incoming and outgoing emails, as well as every file you access, detecting and blocking threats before they can cause any damage.

There's a new focus on performance in this version, though. Like some of the competition, AVG Anti-Virus Free now checks known safe files just once, rescanning them only if they've changed: once that initial check is out of the way, scans can be much faster than in previous versions.