If you are into development on Windows platform working on the UWP app for Windows 10
Microsoft last released Windows 10 Redstone Build 10586.420 to everyone on Windows 10 version 1511.
Microsoft has now released Windows 10 Redstone Build 14366 to Insiders in Fast ring today.
You can now download the Windows 10 Build 14342 official ISO images for all versions
Thanks for staying tuned and here is more about Windows Phone 8.1, revealed in leaked