Node.js is a portable javsacript runtime that uses the Chrome's V8 engine to execute scripts outside of the browser. Click here to learn more about node.js
If you like clicking the next button on installers, you can go to http://nodejs.org/ and download the latest version of node for Windows. Once it is installed, proceed to step 2.
OR
If you want to look like a 1337 computer hacker, do it the chocolatey way. Open up a new command prompt as an administrator and run the following command: