Avast! Free Antivirus - very simple and easy to use antivirus
, which provides a reliable protection of your computer.
Currently there are 3 versions of anti-virus. One of them is free and two - paid. However, the difference between them is so small that most people choose the free version, because it is sufficient to provide quality protection for your computer from viruses. The only drawback of the free version is that once per year you should pass registration procedure (enter your name and email).
Avast download from the server more data than other antivirus programs when updating antivirus databases. For example, usually it download around 5-10MB per one day. Other anti-virus download around 1-2 MB in the same time.
To ensure complete protection against viruses, Avast uses 8 shields: file system, web, mail, firewall, P2P, Internet chat and behavior scenarios.
Also Avast has an additional component - "sandbox". It can be used to open files that could theoretically contain a virus. If you open in "sandbox" the file that has a virus, the virus can not harm your computer.
Currently, about 170 millions computers protected by antivirus software Avast.