title: Angular 4 after installing all modules I have errors
body: <p>I would like to try and learn angular.
  So I have installed it.
  (I have used this video: <a href="https://www.youtube.com/watch?time_continue=2&amp;v=g13I7Xy1PtI" rel="nofollow noreferrer">https://www.youtube.com/watch?time_continue=2&amp;v=g13I7Xy1PtI</a>)</p>
  
  <p>But all "modules" (?) have error... :(
  this is the  '<code>ng -v</code>' result:</p>
  
  <pre><code>@angular/cli: 1.2.4
  node: 6.11.1
  os: win32 x64
  @angular/animations: error
  @angular/common: error
  @angular/compiler: error
  @angular/core: error
  @angular/forms: error
  @angular/http: error
  @angular/platform-browser: error
  @angular/platform-browser-dynamic: error
  @angular/router: error
  @angular/cli: error
  @angular/compiler-cli: error
  @angular/language-service: error
  </code></pre>
  
  <p>What did I do wrong?</p>