An antivirus software is a virus scanner that detects and removes current and known malware such as viruses, worms, trojans, etc. An antivirus programme belongs on every computer. Today, several malware programmes enter circulation worldwide every minute. Antivirus software looks at data — web pages, files, software, applications — traveling over the network to your devices. It searches for known threats and monitors the behavior of all programs, flagging suspicious behavior. It seeks to block or remove malware as quickly as possible.
Be careful which antivirus protection you download onto your device. Among the free programmes there is also fraudulent software. The independent test institute AV-Test regularly tests the most popular anti-virus programmes. By the way, never run two antivirus programmes on your computer at the same time. There is a danger that they will block one another.