An antivirus is a computer program capable of scanning computer storage mediums for viruses.

Antivirus tools are usually programmed to find Trojan horses and worms in addition to viruses.

A full-featured antivirus software can delete or quarantine malwares after finding and provides resident guard preventing unwanted computer programs from being installed on a computer.

Some antivirus programs are able to detect spywares, though spywares are not classified as virus.

Antivirus programs should be updated regularly to provide best protection.
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