Privacy Ratings

Anti-malware

Microsoft Defender Antivirus privacy rating

Antivirus built into Windows that scans for malware, unwanted software and potentially harmful apps, with cloud-delivered protection from Microsoft. It turns on automatically when no other antivirus is installed.

United States Five EyesPlatforms: Windows

Summary

Microsoft Defender Antivirus scores 35 out of 100 (grade F) on the anti-malware criteria. It meets 1 of 4 criteria: no ads or data sales. It partly meets no trackers or telemetry. It does not meet open source and independent audit. It is based in the United States: Five Eyes member; subject to the US CLOUD Act.

Score 35 out of 100. How scoring works

Criteria

  • No

    Open source Weight 3 of 3

    Is all the source code needed to run the product public?

    Closed source.

  • Partial

    No trackers or telemetry Weight 3 of 3

    Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?

    Reports on suspected malware and file samples are sent to Microsoft by default; this reporting can be turned off.

    microsoft.com

  • Yes

    No ads or data sales Weight 2 of 3

    Is the product funded without advertising, ad targeting or selling user data?

    Included with Windows licenses and shows no ads.

    learn.microsoft.com

  • No

    Independent audit Weight 2 of 3

    Has an independent security or privacy audit been published within the last three years?

    No independent audit is published.

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