Antivirus software is a type of computer program designed to identify, prevent, and remove malicious software (malware) from computers and other electronic devices. It is typically used to scan, detect, and remove viruses, worms, Trojans, and other types of malicious software, as well as block and remove suspicious or malicious websites. Antivirus software also helps to protect against identity theft and other threats, such as phishing and ransomware. It is an essential part of any computer user's security system.