I\'m currently unable to run npm install in any project since today. I\'m running node v8.2.1 & npm 5.3.0 (installed via nvm).
npm install
When typing npm
npm
Adding to @CptUnlucky's answer.
npm config set registry "http://registry.npmjs.org"
This forces the http fetch. If this alone doesn't work, throttle the number of simultaneous connections that can be established. Default Max connections is 50.
npm set maxsockets 3
That worked for me.