Disable Adobe Reader Add-on in IE Won't Work

Hi,

I’m having an issue where I can’t disable the Adobe PDF Reader add-on in IE through GPO. What happens is the add-on says that it is disabled, but PDFs still open inside of IE.

If I don’t apply any policy, and manually disable it, it works fine (PDFs open in their own Adobe Reader application).

The policy I’ve applied is Windows Components/Internet Explorer/Security Features/Add-on Management/Add-on List. I’ve entered {CA8A9780-280D-11CF-A24D-444553540000} for the Adobe Reader add-on, and gave it a value of 0. I’ve also enabled Windows Components/Internet Explorer/Security Features/Add-on Management/All Processes, thinking that might help. I’ve done this in both the Computer and User settings.

If anyone can tell help me with this I’d really appreciate it.  I’ve spent a lot of time on this, and I seem to be getting nowhere.

Thanks