Npm install -g ionic@alpha ERR

C:\WINDOWS\system32>node -v
v0.12.0

C:\WINDOWS\system32>npm -v
2.5.1

C:\WINDOWS\system32>npm install -g ionic@alpha
npm ERR! Windows_NT 6.3.9600
npm ERR! argv “D:\Program Files (x86)\nodejs\\node.exe” “D:\Program Files (x86)\nodejs\node_modules\npm\bin\npm-cli.js” “install” “-g” “ionic@alpha”
npm ERR! node v0.12.0
npm ERR! npm v2.5.1
npm ERR! code ECONNRESET
npm ERR! errno ECONNRESET
npm ERR! syscall read

npm ERR! network read ECONNRESET
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network ‘proxy’ config is set properly. See: ‘npm help config’

I have tried different versions, which I hope the Administration can come up with a solution.