In my windows installation PATH includes C:\\Program Files\\nodejs, where executable node.exe is. I\'m able to launch node
You should use this command to set the global installation flocation of npm packages
(git bash) npm config --global set prefix /npm
(cmd/git-cmd) npm config --global set prefix
You may also consider the npm-cache location right next to it. (as would be in a normal nodejs installation on windows)
(git bash) npm config --global set cache /npm-cache
(cmd/git-cmd) npm config --global set cache