npm hangs on any command

Question

I installed last version of Node.js (12.2 x64 windows) After I run cmd as administrator and try to call any npm command (except npm -v

Answer 1

It's if the prefix is not set correctly.

Just want to point out to those commenting -if you can't get access to the command line npm, then you can't run npm config, obviously.

Open up powershell and type notepad $HOME/.npmrc, and edit the line where it says prefix=... and change it to a valid one.