
As such, Windows Defender does not need to share your browsing history and behavior with other service providers. The free product does not have those pesky encouragements to upgrade to a paid product.

When it comes to security and privacy, Windows Defender has an advantage over its competitors. AV-Test is so impressed that they gave this Microsoft software a perfect 6.0 rating. Windows Defender falsely identified one program as malware, out of more than 1.34 million samples. While AV-Comparatives found that Windows Defender had a lot of false positives, the software had only one false positive during AV-Test's testing.


False positives can hinder you from visiting legitimate websites, or using secure applications. Apart from slowing down your computer, one of the issues when using a lousy security solution is that it gives you a lot of false positives.
