Microsoft has released a change log of what was included in the Windows 10 Release Preview build 10586.456. That build was made available to Insiders for both PC and Mobile in that update ring earlier this week.

Windows 10

The change log was first posted in the Insider Feedback Hub app, and was later reprinted by Microsoft Windows team member Jen Gentleman in her Twitter account:

  • Improved reliability in a number of areas including Windows Media player, Internet Explorer 11, Windows Explorer, Miracast, and Windows kernel.
  • Fixed an issue with some users noticing a black screen instead of the lock screen, when resuming from connected standby.
  • Fixed issue where the DirectAccess Disconnect button appears sometimes even when the connection is not fully established.
  • Fixed issue where local user accounts weren't locked out after a number of failed sign in attempts.
  • Improved support for playback of video in certain applications that did not render the video while the audio continued after resuming from sleep.
  • Fixed issue where the Windows Phone sometimes loses user authentication certificates after upgrading to Windows 10 Mobile.
  • Improved support to honor the data backup settings of applications on Windows 10 Mobile.
  • Fixed issue where Microsoft Silverlight based application won't install on Windows 10 Mobile, after joining Azure Active Directory.
  • Fixed additional issues in .NET, Windows Kernel, Windows Update, Authentication, revised daylight saving time, support for PDF files, Bluetooth, Microsoft Edge, Internet Explorer, Networking and Wi-Fi connectivity.

Usually, the Release Preview build is the last step before it is made available to all Windows 10 users.