Recently I installed Spacemacs on Windows. Installing on Windows tends to be a jungle sometimes. So I like to share the instructions I used. I hope this will help somebody out there!
(using MSYS2: https://msys2.github.io/ )
pacman -S unzip
unzip emacs-25.1-x86_64-w64-mingw32.zip -d emacs/
pacman -S git
git clone https://github.com/syl20bnr/spacemacs ~/.emacs.d