Keep getting the error
An error occurred while trying to generate project files.
Running C:/Program Files/Epic Games/UE_4.14/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project=“C:/Users/David Wright/Documents/Unreal Projects/New folder (2)/OSC_Refined/OSC_Refined.uproject” -game -rocket -progress
Discovering modules, targets and source code for project…
UnrealBuildTool Exception: ERROR: Windows SDK v8.1 must be installed in order to build this target.
Any ideas why?