Windows 10 SDK Preview and Mobile Emulators updated for Developers

Microsoft have released a new Windows 10 SDK Preview and the associated Windows 10 Mobile emulators (Build 10563), to be used in conjunction with Windows 10 Insider Preview (Build 10565).

The Preview SDK is a pre-release and cannot be used in a production environment and developers should only install this on a test machine.

The Preview SDK Build 10563 contains bug fixes and under development changes to the API surface area.

If you are working on an application that you need to submit to the store, you should not install the preview.




  • Updated the OS image included with the Windows 10 Mobile Emulator


  • Corrected the signing of the Microsoft General MIDI DLS for Universal Windows Apps Extension SDK
  • Corrected the “No .natvis files found” error when you run Debugging Tools For Windows (WinDbg)” issue with WinDbg.
  • Corrected the Windows Performance Analyzer crashes when ResidentSet graph is used
  • Corrected problem that prevented trace capture on pre-Windows 8 OS releases using xperf.exe and wpr.exe.
  • Corrected Windows Performance Analyzer crash when trying to modify the symbols inclusion/exclusion list in the Load Settings tab of the Configure Symbols dialog.
  • Improved Intellisense documentation for a large number of APIs.

Updated tests in the Windows App Certification Kit:

  • The “App prelaunch” test was enabled. This test proactively prelaunches and keeps apps in the background, verifying that the app handles the prelaunch scenario correctly.
  • The “App resources” test now runs correctly against UWA apps. This could result in failures not previously seen but for which the apps were always expected to pass.
  • The “Supported APIs” test no longer fails the app if the app invokes approved APIs by ordinals.

The Preview SDK can be downloaded from the Windows 10 Developer Tools page.

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