OK, this looked rather scary and also rather unbelievable so I did a quick research and unsurprisingly it turned out this is blown way out of proportion (if not downright wrong).<p>The article claims DiagTrack collects "your name, email address, preferences and interests; browsing, search and file history; phone call and SMS data; device configuration and sensor data; and application usage". That description is credited to Microsoft itself ("As Microsoft explained"). But if you follow the link it turns out it's not really Microsoft's explanation, but just what some user on official Windows forum wrote. My guess: Windows Technical Preview did (or had ability to do) that and user confused one thing with another.<p>Next thing, DiagTrack came to Windows (TP) via update KB3022345, so let's check that update: <a href="https://support.microsoft.com/en-us/kb/3022345" rel="nofollow">https://support.microsoft.com/en-us/kb/3022345</a><p>"The Diagnostic and Telemetry service collects diagnostics information about functional issues on Windows systems that participate in the Windows Customer Experience Improvement Program (CEIP). CEIP reports <i>don't</i> contain contact information, such as your name, address, or telephone number. This means CEIP won't ask you to participate in surveys or to read junk email, and you won't be contacted in any other way."<p>Of course, it's still possible there's some foul play here, but I'd prefer it would be investigated first and accusations thrown later, not the other way around.