npm中npm install 始终出错解决办法

C:\Windows\System32>npm install -g gulp

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” "gulp"

npm ERR! node v0.12.2 npm ERR!

npm v2.7.4 npm ERR! code ECONNRESET

npm ERR! network tunneling socket could not be established, cause=connect ETIMED OUT

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 settin gs.

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’

npm ERR! Please include the following file with any support request:

npm ERR! C:\Windows\System32\npm-debug.log

$ npm config set registry "http://registry.npmjs.org/"