Avast! Protect Your P.C

Avast! is an antivirus program developed by Alwil Software. It was First released in 1998. First it was just a tool to remove the Vienna malware. .
Avast! is a central scanning engine that is certified by ICSA Labs.
It is also included with anti-spyware technology. Avast is certified by West Coast Lab's Checkmark process, as well as anti-rootkit. It has self-protection capabilities. It is a multiple recipient of the Virus Bulletin VB100 Award for its detection of 100% of "in-the-wild" viruses, and is a past winner of the Secure Computing Readers' Trust Award. The name Avast is derived from "Anti-Virus – Advanced Set". Its trademarked name is styled in all lower-case and includes an exclamation mark.
Avast! Free Antivirus is the freeware version of the Avast! antivirus software available to Microsoft Windows and Linux users, while Avast! Pro Antivirus is offered to businesses and users who want additional features. Priority updates are delivered automatically using PUSH update technology in Avast! Pro Antivirus. Avast! Pro Antivirus also has a command line scanner and a script blocker; however, in version 6, the script blocker is available to users of the free version.
Avast! Antivirus is a widely used antivirus program, with over 165 million users worldwide as of October 2011.
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