Unable to package project for windows x64

i don’t understand what’s wrong in it…
please help me resolve this.

attacking the log file.link text

Hello,

UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: ERROR: Windows SDK v8.1 must be installed in order to build this target.

You’ll need to install the Windows 8.1 SDK in order to package your project.

Once you have this installed, if you still experience a packaging failure, please provide your new output log.

Have a great day

thank you so much Sean for your time and reply.

I got the package done by installing Visual Studio 15 and its core components. i think Windows 8.1 SDK is also there in that package.

at last it worked for me… thanks so much again.