Microsoft KB Archive/249756

From BetaArchive Wiki
Knowledge Base

OL2000: Error Message: "Outlook Caused an Invalid Page Fault in Module <unknown>"

Article ID: 249756

Article Last Modified on 11/5/2003


  • Microsoft Outlook 2000 Standard Edition

This article was previously published under Q249756

IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:

256986 Description of the Microsoft Windows Registry


When you right-click a message that contains an attachment, and then click View Attachments, you receive the following error message:

This program has performed an illegal operation and will be shut down. If the problem persists, please contact the program vendor.

When you click Details, the following message appears:

Outlook caused an invalid page fault in module <unknown> at 0000:00000009.

NOTE: The hexadecimal address that appears in the error message may be different.


To resolve this problem, obtain Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a).

To obtain SR-1/SR-1a, click the article number below to view the article in the Microsoft Knowledge Base:

245025 OFF2000: How to Obtain and Install Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a)

To temporarily work around this problem, use either of the following methods.

  • Use an alternate method of viewing the attachment, such as double-clicking it or clicking the paperclip in the preview pane.
  • Delete the extension that registers for attachment events.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
To determine which extension is causing the problem, follow these steps:

  1. Click Start, click Run, and type regedit in the Open box.
  2. Navigate to the following key:


  3. Backup the Extensions key by selecting the registry key, and on the Registry menu, click Export Registry File.
  4. Delete the extensions one at a time, and test the removal of each.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was corrected in Microsoft Office 2000 SR-1/SR-1a.

Additional query words: OL2K IPF

Keywords: kbbug kbfix KB249756