An error occurred while trying to generate project files.
Running C:/Program Files/Epic Games/UE_4.15/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project=“C:/Users/Colin/Documents/Unreal Projects/MyProject/MyProject.uproject” -game -rocket -progress
Discovering modules, targets and source code for project…
ERROR: Windows SDK v8.1 must be installed in order to build this target.
I’m not actually an expert, but error seems to be pretty obvious. You need to install Windows SDK v8.1.
If you’re using VS 2017 launch Visual Studio Installer, mark Windows SDK v8.1 under “Individual Components” Tab and press install. Otherwise, download it form here:
Windows SDK archive - Windows app development (the page is on russian, but you’ll probably will be redirected to equivalent on you language)