Q:

Gulp doesn't work after reinstalling Windows

Upon reinstalling Windows 10 (and Node.js), the gulp command isn't found. I ran it from my root folder containing package.json and the node_modules folder. I tried npm install gulp, and also npm install: gulp command still not found. I'm a bit puzzled. 
Any idea?

A:

do you re install node and npm again? when you re install node try with npm install -g gulp

