“Adobe Acrobat does not support Internet Explorer’s Enhanced Protected Mode (EPM)” Error Message

One user reported that whenever she opened up a link to a PDF file from Internet Explorer, this error message popped up.

acrobat-epm

 

Adobe Acrobat does not support Internet Explorer’s Enhanced Protected Mode (EPM). Either install the latest version of Adobe Reader or disable EPM in Internet Explorer.

This message puzzled me for a while because Enhanced Protect Mode is for IE 10 or above. My user still uses IE 8, and there was no EPM for IE 8. I then checked the version of Acrobat Reader and it was already the latest version, so there was no need to update it.

Later, I found out that there were two Acrobats installed on the machine. One was the Acrobat Pro 9 and the other was the Acrobat Reader 11. The default program to open PDF files was set to Acrobat Pro 9 and this was the cause of the error message. I tried to set the default program to Acrobat Reader 11 and the problem was fixed.

Here are the steps to set Acrobat Reader 11 as the default program for PDF files.

  1. Open Acrobat Reader 11.
  2. Click on Edit -> Preferences.
  3. Click on General on the side bar.
  4. Click on the button Select Default PDF Handler.
  5. Click on the drop down box and select Adobe Reader XI.
  6. Click on Apply and then OK to exit out the dialogs.

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