Setting up source control

im using VS2017. i dont know what i did wrong need swome help out here…
i downloaded the release notes from the git and unzipped it after that i had to run the bacth files and it gives me this

Setting up Unreal Engine 4 project files…

GenerateProjectFiles ERROR: It looks like you’re missing some files that are req
uired in order to generate projects. Please check that you’ve downloaded and un
packed the engine source code, binaries, content and third-party dependencies be
fore running this script.

Press any key to continue . . .