From AVG Technologies USA:
Surf, search, and keep up with friends on Facebook with security software used by 110 million people around the world. You'll also enjoy worry-free gaming and one of the fastest scanning speeds on the market. AVG's Community Protection Network shares the latest threat information with the online community to ensure everyone receives the highest form of protection possible, and AVG's Protective Cloud Technology serves as an early warning system to block new threats and reduce false positives. AVG Anti-Virus Free 2011--remarkable protection, absolutely free.
What's new in this version:
Version 10.0 includes enhanced LinkScanner and Email Scanner and adds new features, such as Social Networking Protection, Smart Scanning, Autofix Button, Community Protection Network, and Protective Cloud Technology.