Problem with ionic installation on windows 8

Hello guys.
i have a problem with ionic installation.
here is the procedure i used :

  • i downloaded and installed the nodejs 6.8.1 for wondows 8
  • i installed cordova with this command : npm install -g cordova
  • i installed ionic with this command : npm install -g ionic
    But evenry times when i want to start a new project by typing the command : ionic start myapp, there isan error message saying that a module is missing. but when i install the required module, another message saying that another plugin is missing.
    How to correct it ?
    thanks

Is your machine connected to Internet when you create the project. If not try connecting it to Internet while you create a new project