I am developing Universal App using VS2015 in Win10. The simulator and the android emulator is running fine. But when I started the Windows Phone Mobile Emulator, then the emula
Installing the new emulators fixed the issue for me.
https://go.microsoft.com/fwlink/p/?LinkId=615095
You need to install latest emulators and Windows SDK, you can get them from this page.
https://dev.windows.com/en-us/downloads/windows-10-developer-preview
Its also suggested to update your UWP Tools
http://go.microsoft.com/fwlink/?LinkId=627168