Visual studio 2015 typescript application package.json not installing the package

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Hi Team,

i am facing one issue while i try to develop angular 4 with typescript application in VS2015. here is the issue which i got when restore the package.json

====Executing command 'npm install'====


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"
npm ERR! node v7.7.2
npm ERR! npm  v4.1.2
npm ERR! code ECONNREFUSED
npm ERR! errno ECONNREFUSED
npm ERR! syscall connect
npm ERR! Error: connect ECONNREFUSED 151.101.8.162:443
npm ERR!     at Object.exports._errnoException (util.js:1033:11)
npm ERR!     at exports._exceptionWithHostPort (util.js:1056:20)
npm ERR!     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1105:14)
npm ERR!  { Error: connect ECONNREFUSED 151.101.8.162:443
npm ERR!     at Object.exports._errnoException (util.js:1033:11)
npm ERR!     at exports._exceptionWithHostPort (util.js:1056:20)
npm ERR!     at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1105:14)
npm ERR!   code: 'ECONNREFUSED',
npm ERR!   errno: 'ECONNREFUSED',
npm ERR!   syscall: 'connect',
npm ERR!   address: '151.101.8.162',
npm ERR!   port: 443,
npm ERR!   parent: 'helloworld' }
npm ERR! 
npm ERR! If you are behind a proxy, please make sure that the
npm ERR! 'proxy' config is set properly.  See: 'npm help config'
npm ERR! Please include the following file with any support request:
npm ERR!     D:\Manikandan\Project Demos\HelloWorldTypeScriptApplication\HelloWorldTypeScriptApplication\npm-debug.log

====npm command completed with exit code 1====

What I have tried:

{
	"version": "1.0.0",
	"name": "helloworld",
  "private": true,
  "description": "hellow world",
  "main": "Systemjs.config.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",
  "devDependencies": {
    "@types/node": "^8.0.56",
    "systemjs": "^0.20.19",
    "typescript": "^2.6.2"
  },
  "dependencies": {
    "@angular/common": "^5.1.0",
    "@angular/compiler": "^5.1.0",
    "@angular/compiler-cli": "^5.1.0",
    "@angular/core": "^5.1.0",
    "@angular/forms": "^5.1.0",
    "@angular/http": "^5.1.0"
  }
}