What to Do If PDF Attachments Cannot Be Previewed in Outlook?

If you receive an error message when you attempt to preview a PDF file in Outlook reading pane, you can take the following troubleshooting steps to resolve this issue.

Generally speaking, as long as you’ve installed a PDF reader on computer, you will be able to preview the PDF attachments in Outlook reading pane. So if you see the error message “This file cannot be previewed because of an error with the following previewer: PDF Preview Handler for Vista” when you try to preview the file, there must be something wrong occurring. Here are 3 easy steps to help you troubleshoot the issue.Cannot Preview PDF Attachment

Step 1: Verify If Latest PDF Reader Is Installed or Not

At times, if your PDF reader is not upgraded in time or the upgrading process is interrupted halfway, you may be unable to preview the PDF files in Outlook. Thus, in the first place, you should ensure that you’ve gotten a latest PDF reader. You’re able to check this simply within the PDF reader program itself. Provided that it is the up-to-date version, you should move on to the next step.

Step 2: Check If PDF Preview Handler Is Activated or Not

In our previous article “How to Disable Attachment Preview in Outlook for Security Considerations”, we can find that the preview feature can be disabled easily. Thus, in order to prevent this feature from being forbidden, you ought to take the steps below:

  1. To start with, go to “File” menu and select “Options”.
  2. Then in the “Outlook Options” window, switch to “Trust Center” tab and hit “Trust Center Settings” button.
  3. In the subsequent “Trust Center” window, shift to “Attachment Handling” tab and click on “Attachment and Document Previewers” button.Attachment Handling
  4. Lastly the “File Previewing Options” dialog box will show up. In it, you ought to mark the checkbox next to the “PDF Previewer Handler for Vista” option.PDF Preview Handler for Vista

Step 3: Edit a Registry Value to Fix the Issue

After the above 2 steps, assuming that the PDF preview still fails, it is likely that a registry value involved with the PDF reader is missing or corrupt. You have to edit a registry value.

  1. For a start, close Outlook and go to “Start Menu”.
  2. Then search “regedit” and press “Enter” key button.
  3. In the latter Registry Editor window, you should browse to the following keys: “HKEY_LOCAL_MACHINE” > “SOFTWARE” > “Wow6432Node” > “Classes” > “CLSID” > “{DC6EFB56-9CFA-464D-8880-44885D7DC193}”.
  4. Next under “{DC6EFB56-9CFA-464D-8880-44885D7DC193}” key, create a new string value called “AppID”.
  5. Later change its data to “{534A1E02-D58F-44f0-B58B-36CBED287C7C}”, like the screenshot below:Edit the AppID Registry Value
  6. Finally exit Registry Editor and restart Outlook to check if the issue is gone.

Cope with a Variety of Outlook Issues

It is pretty common to encounter assorted issues in Outlook. To be honest, even for users who have utilized Outlook for decades, it is still considerably difficult to predict when problems will occur to Outlook. More sadly, sometimes, a tiny issue can lead to severe data loss. Hence, it is suggested to back up your Outlook data regularly. Also, keep a well-proven repair tool in vicinity, like DataNumen Outlook Repair. It can repair Outlook data damage without breaking a sweat.

Author Introduction:

Shirley Zhang is a data recovery expert in DataNumen, Inc., which is the world leader in data recovery technologies, including repair SQL Server file problem and outlook repair software products. For more information visit www.datanumen.com

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