How Does Antivirus Work?
Antivirus is software that helps detect, prevent, and remove malware (malicious software) like viruses from your device. Antivirus also helps protect against other threats, such as ransomware, spyware, and trojans, which can steal or delete data, create backdoors for remote access, and spy on your activity online. Antivirus programs typically use a combination of advanced technologies to scan for and block these types of threats.
How Does Antivirus Work?
Most antivirus programs start by checking the files and computer applications that come into or go out of your system against a database of known malware signatures. The programs then identify and isolate any files that match these definitions, and automatically scan, quarantine, or delete them. They also update their definitions regularly to ensure they can spot the latest threats as soon as hackers release them.
Some antivirus programs offer different scanning options, such as on-access scanning, which starts automatically when you open a program or access a file on your device. Others include scheduled scans, which allow you to set up automatic, regular scanning sessions. Still others use quick scans, which are limited to commonly used areas of your device and usually take less than 30 minutes to complete.
The best antivirus software earns high marks from independent testing labs, and is continuously updated to provide the most up-to-date threat detection capabilities. Combined with a robust firewall and other security layers, antivirus can help you keep your devices safe from most basic cyber threats. However, advanced tactics such as credential theft and living-off-the-land attacks require broader protection solutions.