http://blogs.microsoft.com/on-the-issues/2015/04/03/an-update-on-microsofts-approach-to-do-not-track/ [blogs.microsoft.com]

An update on Microsoft’s approach to Do Not Track

As industry standards evolve, how we implement those standards evolve as well. So to reflect the current requirements of the privacy standard for tracking preferences, Microsoft is changing how Do Not Track (DNT) is implemented in future versions of our browsers: We will no longer enable it as the default state in Windows Express Settings.

Related threads on WebmasterWorld:

• IE 10 - tracking turned off as default [webmasterworld.com]
  
• Microsoft sticks to default Do Not Track settings in IE 10 [webmasterworld.com]
  
• Apache Web Server To Ignore IE10 Do-Not-Track Setting [webmasterworld.com]
  
• IE9 will have "no tracking" feature [webmasterworld.com]