I installed nodeJS 4.5.0.
Then struggled to install ExpressJS.
Later on, found the solution at the following site:
https://github.com/expressjs/express
Use the commands below (Windows 7 64 bit) in the command prompt:
1. npm install -g express-generator
This installs all the express dependencies and modules.
2. express expressjs && cd expressjs
This sets up the folder "express" to load all the needed files for installation.
3. npm install
This installs the expressjs package.
4. npm start
This starts the server.
