Can't open or preview .PDF attachment in Outlook

Last reviewed on October 9, 2013

When you attempt to view a PDF file in the reading pane and receive the following error message

This file cannot be previewed because of an error with the following previewer
PDF Preview Handler

It means a value in your registry is missing or corrupt. You can fix it by editing the registry.

  1. Press Windows key + R to open the Run command
  2. Type regedit and press Enter to open the Registry Editor
  3. Browse to the following registry key and add the AppID value {534A1E02-D58F-44f0-B58B-36CBED287C7C}

Note: if AppID string value does not exist, you need to create it.

Alternately, you can copy and paste the registry values below into Notepad, save the file with a .reg extension then double click to run it.

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
"AppID"="{534A1E02-D58F-44f0-B58B-36CBED287C7C}"

Do It For Me

Don't want to edit the registry yourself? Download the following registry file and double click to run it. It works with all 64-bit versions of Windows.

pdf-preview.reg

Written by

Diane Poremsky
A Microsoft Outlook Most Valuable Professional (MVP) since 1999, Diane is the author of several books, including Outlook 2013 Absolute Beginners Book. She also created video training CDs and online training classes for Microsoft Outlook. You can find her helping people online in Outlook Forums as well as in the Microsoft Answers and TechNet forums.

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