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The problem experienced by the user here is similar to what I get in that I receive a prompt: "This webpage wants to run 'AcroPDF.dll'. If you trust this site, you can disable Enhanced Protected Mode for this site to run the control." IE10 AcroPDF.dll EPM error

I understand the prompt can be removed by by disabling EPM but my major concern is actually how to view a PDF when the "Always ignore" button has been clicked. I haven't been able to find a way to undo this and a couple of users have accidentally selected the option since IE 10 was rolled out. When a user clicks on a PDF after the "Always ignore" button has been checked for that website they only ever see a black box with a cross.

missing pdf after clicking "Always ignore" in IE10

Tried so far:

  • Uninstalled & reinstalled IE10
  • Checked for entries in HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Safety
  • Performed a repair on Adobe Reader from the menu options.
  • Completely reinstalled Adobe Reader
  • Deleted temporary internet files
  • Disabled EPM after the pdf had been ignored.
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5
  • What version of Adobe Reader do you have installed? Adobe Acrobat XI does not have this problem.
    – Ramhound
    Commented Jan 15, 2014 at 22:28
  • I should have included that information, sorry. The Adobe Version is 11.0.0.379
    – Jake Nelson
    Commented Jan 15, 2014 at 22:35
  • 1
    I can't find a conclusive answer on if uninstalling IE10 deletes browsing history, so on the off chance it doesn't, have you tried Ctrl+Shift+Del (Tools -> Delete browsing history) with "History" checked and see if that brings back the EPM "Disable" and "Always Ignore" buttons?
    – panhandel
    Commented Jan 15, 2014 at 22:42
  • Panhandel solved it. I didn't have any option to delete browsing history as it's denied within group policy. I created a new GPO and deleted everything and the prompt came back when I revisited the failing site. Do you want to copy your comment to the answer section?
    – Jake Nelson
    Commented Jan 15, 2014 at 22:52
  • @Mokilok will do
    – panhandel
    Commented Jan 15, 2014 at 23:03

2 Answers 2

Reset to default
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I don't think uninstalling IE10 deletes browsing history, so as a test, can you Ctrl+Shift+Del (Tools -> Delete browsing history) with "History" checked and see if that brings back the EPM "Disable" and "Always Ignore" buttons?

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-1

  • Create a system restore point

  • search your computer to find the acropdf.dll file if it is not on your hard drive you may need to download from a site.

  • Copy or Save the file to the following location on your system: C://Windows//System32

  • Confirm the replacement of the old, damaged acropdf.dll file.

  • Register the File

  • Click the Windows logo in the bottom, left corner of the screen.

  • Type cmd in the Search field if you are using Vista or Windows 7. Click Run and type cmd in the Open field if you are using Windows 7. Press Enter. This opens the Command Prompt.

  • Type the following command in the prompt:

    Regsvr32 acropdf.dll

Press Enter to register the file. Exit the Command Prompt and restart your system.

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