Ruby Installation

Hi , I am trying to install Ruby using rubyinstaller-2.4.2-2-x64.
My ultimate goal is to install middleman to use for Slate.
I m facing some issue while installing MSYS2 system update.
Please help n guide me through this as i am absolutely new to Ruby.

Do I need any dev kit for this version of ruby ?

Try this link : https://middlemanapp.com/basics/install/
there’s a video regarding a Windows installation.