The Node project provides an install file for Windows systems. Visit http://nodejs.org/download/, and look for Windows Installer:
Download that file and double-click on it. Follow the prompts to install Node on your system.
The Node project provides a
node.exe file that you may download and call without installing anything on your system. Visit http://nodejs.org/download/, and look for Windows Binary.
Download that file and put it in a directory you'll remember. Now you can call the file from the command ...