Configuration doesn't work for using vundle on vim

Question

I install Vundle by the step of its github homepage. I have installed the git, curl and clone the vundle to my directory.

While I encountered problems as follows:

Error detected while processing C:\Program Files\Vim\_vimrc:
line   21:
E518: Unknown option: $VIM/vimfiles/bundle/vundle/
line   22:
E117: Unknown function: vundle#rc
line   23:
E492: Not an editor command: Bundle 'gmarik/vundle'
line   24:
E492: Not an editor command: Bundle 'Lokaltog/vim-easymotion'
line   25:
E492: Not an editor command: Bundle 'bling/vim-airline'

Here is a snippet of my _vimrc(in windows):

filetype off
set rtp += $VIM/vimfiles/bundle/vundle/
call vundle#rc('$VIM/vimfiles/bundle/')
Bundle 'gmarik/vundle'
Bundle 'Lokaltog/vim-easymotion'
Bundle 'bling/vim-airline'
filetype plugin indent on     " required!
"vundle

Answer 1

There must be no spaces in the :set command:

set rtp+=$VIM/vimfiles/bundle/vundle/

That caused the E518: Unknown option.

Furthermore, I would not recommended to put your personal customizations under C:\Program Files\vim; in newer Windows versions, this may only be writable with admin rights. Rather, take the _vimrc from there as a template, and copy all of your customizations to $HOME.