Can't open or preview .PDF attachment in Outlook

Last reviewed on July 16, 2014   —  10 comments

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.

Please post long or more complicated questions at Outlookforums.

10 responses to “Can't open or preview .PDF attachment in Outlook”

  1. Simon

    Nice one Diane - this worked perfectly on my system

  2. TJ Liston

    the "do-it for me" file is not an executable file, it opens and has the cut and paste option.
    Is it meant to be an automatic download and install or just the cut and paste version of the info.thanks

  3. TJ Liston

    Ok, that file extension is already there. I used to be able to open PDF files in outlook, I can save them and then open them but for some reason now I can't open them directly from outlook. Nothing happens when I click on it, no other program pops up to try either. If I go to start menu and go to default programs Adobe is not listed there. Any other help options?
    thanks
    TJ

  4. Isaac Savion

    Hi Diane, I have the same issue; the file extension is already there ("AppID"="{534A1E02-D58F-44f0-B58B-36CBED287C7C}"). any other trick that might help?

    Thank you,
    Isaac.

  5. Isaac Savion

    I'm using Adobe Reader XI \Reader 11.0. running on Win8/64bit.

    Thank you,
    Isaac

  6. minos8

    Hi, here my .reg file who solved my same problem.
    ----
    Windows Registry Editor Version 5.00

    [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeClassesCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
    "AppID"="{534A1E02-D58F-44f0-B58B-36CBED287C7C}"
    "DisplayName"="@C:\Program Files (x86)\Adobe\Reader 11.0\Reader\pdfprevhndlr.dll,-101"
    @="Adobe PDF Preview Handler for Vista"
    "DisableLowILProcessIsolation"=dword:00000000

    [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeClassesCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}InprocServer32]
    @="C:\Program Files (x86)\Adobe\Reader 11.0\Reader\pdfprevhndlr.dll"
    "ThreadingModel"="Apartment"

    [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeClassesCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}ProgID]
    @="PDFPrevHndlr.PDFPreviewHandler.1"

    [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeClassesCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}TypeLib]
    @="{0F6D3808-7974-4B1A-94C2-3200767EACE8}"

    [HKEY_LOCAL_MACHINESOFTWAREWow6432NodeClassesCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}VersionIndependentProgID]
    @="PDFPrevHndlr.PDFPreviewHandler"

    [HKEY_CLASSES_ROOTWow6432NodeCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
    "AppID"="{534A1E02-D58F-44f0-B58B-36CBED287C7C}"
    "DisplayName"="@C:\Program Files (x86)\Adobe\Reader 11.0\Reader\pdfprevhndlr.dll,-101"
    @="Adobe PDF Preview Handler for Vista"
    "DisableLowILProcessIsolation"=dword:00000000

    [HKEY_CLASSES_ROOTWow6432NodeCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}InprocServer32]
    @="C:\Program Files (x86)\Adobe\Reader 11.0\Reader\pdfprevhndlr.dll"
    "ThreadingModel"="Apartment"

    [HKEY_CLASSES_ROOTWow6432NodeCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}ProgID]
    @="PDFPrevHndlr.PDFPreviewHandler.1"

    [HKEY_CLASSES_ROOTWow6432NodeCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}TypeLib]
    @="{0F6D3808-7974-4B1A-94C2-3200767EACE8}"

    [HKEY_CLASSES_ROOTWow6432NodeCLSID{DC6EFB56-9CFA-464D-8880-44885D7DC193}VersionIndependentProgID]
    @="PDFPrevHndlr.PDFPreviewHandler"

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