avast! Free Antivirus is perfect for people who send e-mails and surf popular websites. avast! is a package of applications that aim to protect your computer from a possible virus infection or other malware threat. This is a beta to preview the next version. 

If you use it correctly, and in combination with other programs such as data backup utilities, it will significantly reduce the risk of your computer being attacked or infected by a virus, and thus the risk of losing important or private data. 

Based on the award-winning avast! antivirus engine, avast! antivirus contains all of the features you would expect in a modern antivirus program. It incorporates anti-spyware technology certified by West Coast Labs' Checkmark process, as well as anti-rootkit and strong self-protection capabilities, but now provides even faster scanning with improved detection ability. It contains several real-time "Shields" which continuously monitor your email and internet connections and check the files on your computer whenever they are opened or closed. 

avast! antivirus now also comes with a completely revamped user interface for easier scanning. avast! Pro antivirus offers a number of additional features, including a script shield and a process virtualization module, while avast! Internet Security comes with an antispam filter and built-in firewall. Once installed, avast! runs silently in the background to protect your computer against all known forms of malware. You don't need to do anything else