After recovering a solution for a file in Visual Studio exported from Construct 2, I got errors:
MSB3774 Could not find SDK "Microsoft.WinJS.2.0, Version-1.0" MSB3774 Could not find SDK "Microsoft.WinJS.2.1, Version-1.0"
Open Visual Studio
Choose File-> New Project
Click Windows
Choose Windows 8
There will be an opportunity to install Windows 8.1 tools.