I am using Windows Desktop Search. When I perform a Desktop Search using WDS the results are show on the left hand pane. WDS performs fine when I click on text files, doc files, picture files.
But whenever I click on a PDF file in the left pane a window pops up and asks me if I want to save or cancel because it's an unknown file type. How come

I am using the latest version of WDS and the adobe ifilter.

Thank you.