Cannot install Ionic through npm

Question

I have been now trying to install Ionic framework through npm but with no success. I am trying the usual command,

npm install -g ionic

I already have cordova installed. I have updated my npm version to be the latest and also tried,

npm cache clean

npm config set registry https://registry.npmjs.org/

But I am still getting the following errors:

This is what I get

Any thoughts? Thanks

Run cmd as administrator and see if you have compatible versions of Node and NPM installed. — Keval
I have already answered this question, please refer to stackoverflow.com/a/31124491/1276616 — Anil Singh

Sathish Sathish · Accepted Answer · 2015-05-11T18:43:23

Try using latest version of node and npm. . + try using npm config set registry http://registry.npmjs.org/.. May be you around a firewall