AV-TEST Product Review and Certification Report – Mar-Apr/2019

During March and April 2019 we continuously evaluated 19 home user security products using their default settings. We always used the most current publicly-available version of all products for the testing. They were allowed to update themselves at any time and query their in-the-cloud services. We focused on realistic test scenarios and challenged the products against real-world threats. Products had to demonstrate their capabilities using all components and protection layers.


Windows Defender

PlatformWindows 10 (64 bit)


Protection against malware infections
(such as viruses, worms or Trojan horses)
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Industry averageIndustry averageMarch April
Protection against 0-day malware attacks, inclusive of web and e-mail threats (Real-World Testing) 277 samples used 99.3%100%100%
Detection of widespread and prevalent malware discovered in the last 4 weeks (the AV-TEST reference set) 6,572 samples used 100%100%100%
Protection Score 6.0/6.0


Average influence of the product on computer speed in daily usage
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Industry averageIndustry averageStandard PC Industry averageIndustry averageHigh end PC
Slowing-down when launching popular websites 50 websites visited 14%6%11%8%
Slower download of frequently-used applications 20 downloaded files 1%1%1%0%
Slower launch of standard software applications 20 test cases applied 9%9%8%9%
Slower installation of frequently-used applications 12 installed applications 26%44%24%39%
Slower copying of files (locally and in a network) 6,732 files copied 2%0%3%0%
Performance Score 5.5/6.0


Impact of the security software on the usability of the whole computer
(lower values indicate better results)
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Industry averageIndustry averageMarch April
False warnings or blockages when visiting websites 500 samples used 0 0 0
False detections of legitimate software as malware during a system scan 1,645,256 samples used 3 1 1
False warnings concerning certain actions carried out whilst installing and using legitimate software 38 samples used 0 0
False blockages of certain actions carried out whilst installing and using legitimate software 38 samples used 1 0
Usability Score 6.0/6.0

All tested manufacturers