Installing magento 2 does not deploy the /pub/static/frontend and backend

I'm having this weird error and I did not suceed to find the origin. First of all I would like to say that I succeeded to perform some installation of Magento 2 on a windows os with a xampp server before.

I'm now trying to install a magento instance on Windows Server with IIS

Basically after configuring composer etc.. the installations runs well. No error mentioned during the installation process etc..

However at the end when I try to access at the backend or the front store it display the page but no css or images files are loaded. When I looked in the missing ressources, basically I have 404 errors for all css & images files supposed to be located in the following folders

pub/static/frontend/*
pub/static/backend/*

Physically in my folder pub/static/ there is only the _requirejs folder and .htaccess file but no folder frontend and backend

I guess the folder frontend and backend are generated automatically because they are not by default in the initial clone of magento 2.0

So if anyone has got any ideas of where the problem could come from.

Additional information to consider: I have checked the permissions, the web server has full access (read and write) on every folders and file magento 2.0 root directory.