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Avast! is available as both a free and a paid application.
Avast is available for both Windows and Macintosh as well as mobile Android devices.
- In older versions of Avast, the sound effect used for when a virus was detected was a pig squeal, newer versions changed the sound effect for when a virus was detected. Some rogue anti-viruses use the Pig squeal sound from the older versions of Avast.