8 Replies Latest reply on Feb 9, 2010 7:56 AM by tiede40

    Adobe Reader v9.3 getting "unknown file type" message on download


      Installed Reader 9.3 replacing version 5.1 on my Win XP with SP 2. I have the Microsoft automatic update feature set "on" so I assume that overall my WIN XP (Internet Explorer v 6) is up to date. Having a problem downloading PDF files from trusted Internet sites. No longer getting seamless presentation of the data from the file. Instead, I get pop up security warnings which I have to click to continue and then when I try to download the PDF it tells me that the file type is "unknown". Is this a  v 9.3 problem or a WIN XP (Internet Explorer v 6) problem or both? Is there a solution?