I used node.js to install some things via npm without any problems. Now I changed nothing on my settings (Win8; no proxy, internet is working) and I can\'t install anything
I actually had the same problem, from my workplace I could install everything fine, but it wasn't working from home.
I found out that the custom DNS I set up on my routeur was the problem, I have reverted to the default internet provider one and everything works fine.