Avast.Bcoz its free free free and free
From wikipedia
Features
Screenshot of avast! home edition with the aVist skin created by Sasha-Z-Creations
Screenshot of avast! home edition with the aVist skin created by Sasha-Z-Creations
Screenshot of avast! home edition without any skins
Screenshot of avast! home edition without any skins
* Standard Shield — Real-time protection
* IM shield — Instant Messenger protection
* P2P shield — P2P protection
* Internet Mail — E-mail protection
* Outlook/Exchange — Microsoft Outlook/Exchange protection
* Web Shield — HTTP protection (localtransparent proxy)
* Script blocker — script checker
* Network Shield — basic protection against well-known network worms. Acts as a lightweight Intrusion Detection System
* Audible alarms — vocal warnings such as "Caution, a virus has been detected!"
* Boot-time scan — through the program interface, a user can schedule a boot-time scan to remove viruses that load during Windows startup and are therefore difficult to remove.
[edit] Virus Chest
The avast! Virus Chest is an isolated folder where infected files can be stored when detected. Placing them in the chest causes the files' usage to be disabled and prevents them from causing any harm. The virus chest also stores vital system files to prevent them from virus damage. They still can be run, but the access to the file by any source or other program is blocked until it is removed from the chest.
[edit] Automatic update
avast! Antivirus normally updates itself freely for the first 14 months of usage as long as the using computer is connected to the Internet. After each 14 month period, the user of the software must re-register to receive a new license key. Unless upgrading to the pay version, registration currently remains free.
[edit] Other uses
avast! is compatible with various archiving software (including WinRAR) and IM applications, thanks to its tool, ashquick.exe which scans for viruses using a minimalist interface.