Antivirus is a type of security software designed to protect computers, laptops, smartphones, and other digital devices from harmful threats such as viruses, malware, ransomware, spyware, and phishing attacks. It works by scanning files, programs, and applications for suspicious behavior or malicious code and either removing or quarantining them before they can cause damage. Modern antivirus programs not only detect traditional viruses but also provide real-time protection against advanced online threats, including malicious websites, unsafe downloads, and unauthorized access attempts. Many antivirus solutions now integrate with firewalls, email filters, and web protection tools to deliver comprehensive security, ensuring that personal data, financial information, and sensitive files remain safe. They regularly update their virus definitions to stay ahead of newly emerging threats and often use artificial intelligence or machine learning for faster detection. Having an antivirus installed is essential for both individuals and businesses, as it helps prevent data breaches, identity theft, system corruption, and downtime. With cyberattacks becoming more sophisticated, antivirus software plays a crucial role in maintaining digital safety and providing users with peace of mind while browsing, downloading, or working online.