Antivirus software deals with the security of a computer system. Antivirus software, or anti-virus software, is also known as anti-malware. It is a computer program used to prevent, detect, and remove malware. Various important Antivirus:Bitdefender Antivirus Plus. Well, rounded everyday antivirus protection. Norton AntiVirus Plus. Smooth protection for your system. Avira Antivirus Pro. F-Secure Antivirus SAFE. Kaspersky Anti-Virus. Trend Micro Antivirus+ Security. Webroot SecureAnywhere AntiVirus. ESET NOD32 Antivirus. Important Points Functions performed by AntivirusScanning directories or specific files for known malicious patterns indicating the presence of malicious software. It allows users to schedule scans so that process runs automatically. Allowing users to initiate new scans at any time. Removing any malicious software it detects in the computer or in the network. Some antivirus software programs do scanning automatically in the background, while others notify users of infections and ask them if they want to clean the files.