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Antivirus is software that identifies, prevents, and removes malicious codes or programs (malware) from computers and devices. It can also help protect devices against malware threats that try to steal personal information or harm devices, systems, or networks.

Viruses are created by hackers to gain access to your private data and computer programs, steal files, or even make your devices stop working. They can be spread through emails, advertisements, pop-ups, spam websites, and by inserting removable devices into a computer (such as USB sticks). Antivirus works to detect malware threats, removing them from the device or blocking their transmission, so they cannot cause damage to your system.

An antivirus program scans your files and programs and compares them to a database of known malware signatures. It can also perform real-time scanning, identifying suspicious activity that may indicate malware presence. It can also employ a feature called heuristic detection, which analyses the behavior of files and looks for patterns that are characteristic of specific types of viruses.

The best antivirus programs are constantly improving their ability to detect new viruses and malware, as hackers are always creating and distributing them. To find the right antivirus program for you, check out its detection rate in controlled tests and what other safety features it offers. For example, some programs can encrypt sensitive data to prevent others from reading it and even remotely delete it; other software can warn you about dangerous sites before you click on them and provide safe browsing.