Windows Defender SpyNet membership must be disabled.

From Windows 8 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

SV-48251r1_rule Windows Defender SpyNet membership must be disabled.

Vulnerability discussion

Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive information from being sent outside the enterprise and uncontrolled updates to the system. This setting disables SpyNet membership and reporting.

Check content

Fix text

Configure the policy value for Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender -> "Configure Microsoft Active Protection Service Reporting " to "Disabled".

Pro Tips

Lavender hyperlinks in small type off to the right (of CSS class id, if you view the page source) point to globally unique URIs for each document and item. Copy the link location and paste anywhere you need to talk unambiguously about these things.

You can obtain data about documents and items in other formats. Simply provide an HTTP header Accept: text/turtle or Accept: application/rdf+xml.