Reload ~/.vimrc by typing the following command:
:so $MYVIMRC

Windows environment

create c:\Users\xxxxx\.vim\bundle\
git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
put _vimrc in c:\Users\xxxxx\
Launch vim and run :PluginInstall

Linux environment

mkdir .vim/bundle
git clone https://github.com/VundleVim/Vundle.vim.git ~/.vim/bundle/Vundle.vim
put _vimrc in c:\Users\xxxxx\
Launch vim and run :PluginInstall