I don't use KDE and I am only familar with Gnome.
In FC the default set-up for the file view is just that , it just displays the files , if you want to set nautilus to act like a browser with a tree view on the left side like in windows then here is what you do :
System Tools -> Configuration Editor -> apps ->
nautilus -> preferences
and then check the box for "always_use_browser"
Once you have done that , open either "Start Here" , "Computer" or <user's> Home
and then click on the side pane and then select "Tree" .
You will then have the same type of file browser as Windows Explorer with a tree view in the left pane and the file names in the right pane.