Adobe Flash player- Not an option

Hi I'm not very computer/technology savvy so I'm not sure of a lot of things so please bare with me. I am aware that Flash Player is pre-installed in Google Chrome, but it is not enabled so I followed the instructions in enabling Flash Player. So to do this I have typed chrome:plugins into my browser and the plugin page comes up. However when I click details in the upper right hand corner of the page I cannot find the Flash (or Shockwave Flash) listing on the Plug-ins page.

What is showing is the following:

Plugins (2)

Chromium PDF Viewer (2 files)

Native Client

How am my going to enable Adobe Flash player when this is not an option for me? please help.