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A quality antivirus program should safeguard you from all kinds of malware, including worms as well as Trojan horses. Additionally, it should be able detect and stop the spread of potentially unwanted programs (PUPs) which could modify your browser settings or make your screen full of ads. Certain premium antiviruses come with additional features such as dark web monitoring, ID theft alerts, and parental control.

If you’re using Windows, Microsoft’s built in malware protection, also known as Windows Defender on older computers or Windows Security on more recent devices, does a good job of protecting your computer. However it’s not as speedy or efficient in detecting malware as standalone antivirus brands that consistently score well in independent lab tests. It doesn’t include any additional security features such as password managers, or software for other devices.

The most effective antivirus for Windows Based on protection against malware as well as system impact and ease of use, is Bitdefender Antivirus Free Edition. It is easy to install and use and was rated highly by the AV-Test labs. It provides one PC for a low price, but you can get broader protection for an additional few dollars with Bitdefender Total Security or Antivirus Plus.

A good antivirus suite that is paid usually comes with a variety of additional features, like an VPN and tools for optimizing performance and software for Mac, iOS and Android. If you’d rather simply stick to the basics, Sophos Home Premium offers solid protection against malware and several other features at reasonable prices.