Antivirus

Antivirus is a type of software designed to detect, prevent, and remove malicious software, such as computer viruses, from a computer system. Antivirus software works by scanning the contents of a computer system or network for malicious code such as viruses, worms, and trojans, and comparing them with a database of known malicious code. If malicious code is detected, the antivirus program will take steps to either delete the malicious code, quarantine it (i.e. move it to a separate area where it cannot execute), or (if it is a known virus) repair any damage done by it.

Antivirus programs can be installed on a computer either as a standalone software application or as part of an internet security suite. Standalone antivirus applications are designed to be used on their own, while internet security suites include an antivirus application as well as additional components such as firewalls and anti-spam tools.

To keep their databases of known malicious code up to date, antivirus programs often offer an automatic updating feature. Many antivirus programs are now able to detect and remove ransomware, which is a type of malicious software that encrypts computer files and renders them unusable until a ransom is paid.

Although antivirus programs are critical in keeping computers safe from malicious software, they are not a substitute for sound security practices, such as regularly updating operating systems and software. It is also important to avoid downloading unknown or suspicious files and software, especially from P2P networks, and to avoid visiting unsafe websites.