角度cli安装错误窗口

Question

我在尝试安装angular-cli时在命令提示符中收到一条奇怪的错误消息。我还以管理员身份运行CMD.exe。错误消息如下所示：

     npm ERR! Windows_NT 6.1.7601
     npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
     node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "angular-cli"
     npm ERR! node v7.4.0
     npm ERR! npm  v4.0.5

     npm ERR! Cannot read property 'path' of null
     npm ERR!
     npm ERR! If you need help, you may report this error at:
     npm ERR!     <https://github.com/npm/npm/issues>

     npm ERR! Please include the following file with any support request:
     npm ERR!     C:\WINDOWS\system32\npm-debug.log

其他信息： Windows 7 64位， 节点版本7.4.0，npm版本4.0.5，