Standard Windows 10 versions do not run on older ARM-based Surface tablets (RT/Surface 2), which were abandoned on Windows RT 8.1. Build 15035 allows these tablets to run a functional, albeit buggy and unofficial, version of Windows 10.
The most reliable source for the is through community forums and specialized documentation for legacy ARM devices. windows 10 build 15035 media builder link
: The original development thread for the Windows 10 Build 15035 Media Builder on XDA is where much of this project originated, though the thread is now closed. Standard Windows 10 versions do not run on