Overview: Antivirus (AV)

Quick Definition

Antivirus is software designed to detect, prevent, and remove malicious software from computer systems. These programs work by scanning files, programs, and incoming data against databases of known malware signatures, as well as using heuristic analysis to identify suspicious behavior patterns that may indicate the presence of unknown threats.

Modern antivirus solutions typically include real-time protection that monitors system activity continuously, automatic updates to maintain current threat definitions, and quarantine capabilities to isolate suspected malicious files. Many contemporary antivirus products have evolved into comprehensive security suites that incorporate additional features such as firewall protection, email scanning, web browsing protection, and anti-phishing capabilities.

While antivirus software remains a fundamental component of cybersecurity defense, it has limitations against zero-day exploits, advanced persistent threats, and sophisticated malware that can evade signature-based detection. For this reason, security experts recommend using antivirus as part of a layered security approach that includes regular software updates, user education, network segmentation, and behavioral monitoring tools.