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The best online antivirus defends your laptop or computer (and typically other devices, such as routers and IoT home appliances) from malware, ransomware, cryptojackers, phishing attacks, data breaches and more. Many antivirus programs offer additional cyber security tools like dark web monitoring, device optimizing and identity theft protections.

The most important aspect of any antivirus program is a strong engine. Every antivirus program needs to detect threats with high accuracy. Other factors, such as a solid behavior-based protection system and a good heuristics engine are also a great help. You should also ensure that the antivirus you choose to use offers a broad range of anti-malware software signatures in its database and a robust and deep collection of scanning techniques.

Windows PCs and Macs both come with built-in antivirus software, but it’s not as efficient as a third-party application. It’s not always updated which can result in missing threats. And it’s often missing the internet security features that make third-party antivirus so useful, including parental controls advanced phishing defenses, and web-based security features.

Avast, Norton, and Kaspersky are the top three antivirus programs that are available. Avast’s free program has high malware detection results in tests conducted by independent lab AV-Comparatives. It’s easy to use. Its parent company was discovered in the year 2019 of selling data that was not encrypted to third-party companies through its Jumpshot service. Since the time it hasn’t taken steps to clean up its practice. Kaspersky has a similar alternative, with a good detection rate for malware and a range of internet security features including memory fire walls, banking tools, and VPNs.