Some users of a website that displays PDFs inline in the browser are not able to view the PDFs. These users are using IE9 and Adobe Reader XI on a Windows 7 machine. They have gone through uninstalling, reinstalling, and repairing Adobe Reader XI and have ensured that the IE settings match the IE settings for other users whose setups work correctly. The only difference is in the Manage Add-Ons. On machines that do work, the publisher for the Adobe PDF Reader add-on is listed as 'Adobe Systems, Incorporated'. On the machines that do not work, the publisher is shown as 'not available'. My gut feeling is that since the publisher is listed as 'not available', IE doesn't trust the add-on and won't run the ActiveX control to display the PDFs in the browser.
They do assure me that they are using the 32-bit version of IE and they have adjusted the ActiveX trust settings in the Security Tab to enable or prompt all the different unsigned or not marked as safe settings there. But still the PDFs do not render in IE9 or any other IE browser version.
How can I fix those systems so that the add-on shows as 'Adobe Systems, Incorporated' on the machines that do not work? Or how can I get them to work regardless of the publisher listed? Or is this even the issue of why these machines will not display
PDFs in the browser?