I installed nodejs in C:\\Program Files (x86)\\nodejs
then I created a .js file and saved it in my desktop just to output \'hello world\' in the console:
Try typing this into the Node command-line environment:
.load c:/users/laura/desktop/nodeTest.js.
.load c:/users/laura/desktop/nodeTest.js
It should work for what you're trying to do.
If you want to call the file directly, you'd have to have it in the root directory where your Node installation resides.