npm ERR! Windows_NT 10.0.10586
npm ERR! argv "D:\Program Files\nodejs\node.exe" "D:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "-g" "n"
npm ERR! node v4.4.3
npm ERR! npm v2.15.1
npm ERR! code EBADPLATFORM
npm ERR! notsup Unsupported
npm ERR! notsup Not compatible with your operating system or architecture: n@2.1.1
npm ERR! notsup Valid OS: !win32
npm ERR! notsup Valid Arch: any
npm ERR! notsup Actual OS: win32
npm ERR! notsup Actual Arch: x64
n 不支持 windows
https://github.com/tj/n#additional-details