离子安装问题窗口

Question

您好我试图在我的Windows计算机上安装离子，我已经安装了nodejs和cordova但是当我使用命令npm install -g ionic

时我遇到了这个问题

C:\Windows\system32>npm install -g ionic
npm ERR! addLocal Could not install C:\Windows\system32\-g
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\nodejs\\node.exe"       
"C:\\Users\\Alejandro\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "ionic"
npm ERR! node v4.2.3
npm ERR! npm  v3.5.1
npm ERR! path C:\Windows\system32\-g
npm ERR! code ENOENT
npm ERR! errno -4058
npm ERR! syscall open

npm ERR! enoent ENOENT: no such file or directory, open 'C:\Windows\system32\-g'

npm ERR! enoent ENOENT: no such file or directory, open   'C:\Windows\system32\-g'

npm ERR! enoent This is most likely not a problem with npm itself
npm ERR! enoent and is related to npm not being able to find a file.
npm ERR! enoent

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

C:\Windows\system32>