Antivirus is software used to prevent, detect and remove malware.

Malware is defined as any software application which subverts the will of the legitimate owner of a computer, by means of force or subterfuge, with or without personal or monetary gain on the part of the creator. Some common malware types are viruses, adware, backdoors, malicious BHOs, dialers, hijackers, keyloggers, rootkits, spyware, trojan horses and worms.

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