In my windows installation PATH includes C:\\Program Files\\nodejs, where executable node.exe is. I\'m able to launch node
Find the current path of your global node package installation by following command.
npm list -g --depth=0
Change this path to correct path by following command.
npm set prefix C:\Users\username(Number)\AppData\Roaming\npm\node_modules
It worked for me. Read my previous answer for better understanding.