Error windows SDK v8.1 must be installed in order to build this target

Have you got c++ components installed in Visual Studio? (They aren’t installed by default). Microsoft’s MDSN site explains how to too add c++ support:

“In Visual Studio 2015, Visual C++ is not installed by default. When installing, be sure to choose Custom installation and then choose the C++ components you require. Or, if Visual Studio is already installed, choose File | New | Project | C++ and you will be prompted to install the necessary components.”