How to Fix Issues with MSMDUN80.DLL (Free Download)

Last Updated: 09/11/2019
[Time to Read Article: 5 minutes]

MSMDUN80.DLL, also known as a String Function .DLL for SQL Enterprise Components file, was created by Microsoft for the development of Microsoft SQL Server. DLL files fall under under the Win32 DLL (Executable application) file type category.

MSMDUN80.DLL was initially released with Office XP on 05/31/2001 for the Windows XP Operating System. The most recent version [file version 2000.080.2039.00] was introduced on 01/30/2007 for Office 2007. MSMDUN80.DLL is packaged with Office 2007, Office 2003, and Office XP.

Please see below for more detailed information, DLL file troubleshooting instructions, and free downloads of different versions of MSMDUN80.DLL.

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File Overview

General Information
File Name: MSMDUN80.DLL
File Extension: DLL file extension
Description: String Function .DLL for SQL Enterprise Components
Object File Type: Executable application
Comments: NT INTEL X86
File Operating System: Windows NT
MIME Type: application/octet-stream
User Popularity Rating:
Developer and Software Information
Software Developer: Microsoft Corporation
Software Program: Microsoft SQL Server
Legal Copyright: © 1988-2004 Microsoft Corp. All rights reserved.
File Details
Character Set: Windows, Latin1
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x1b124
Code Size: 110592

What are MSMDUN80.DLL Error Messages?

Dynamic Link Library MSMDUN80.DLL Errors

MSMDUN80.DLL is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like MSMDUN80.DLL, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like wisptis.exe - to follow. These files were created so that multiple programs (eg. Office) could share the same MSMDUN80.DLL file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when MSMDUN80.DLL is attempted to be loaded either when Office is starting up, or in some cases already running. Some of the most common MSMDUN80.DLL errors include:

Your MSMDUN80.DLL file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Office), or deleted by a malware infection. Furthermore, MSMDUN80.DLL file corruption could be caused from a power outage when loading Office, system crash while loading MSMDUN80.DLL, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix MSMDUN80.DLL Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your MSMDUN80.DLL issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the MSMDUN80.DLL error, please proceed to the Step 2 below.

Step 2: If recently installed Office (or related software), uninstall then try reinstalling Office software.

You can uninstall Office software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Office 2007 and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Office software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Office 2007

Microsoft Corporation

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many MSMDUN80.DLL error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the MSMDUN80.DLL error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your MSMDUN80.DLL File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate MSMDUN80.DLL file version. We maintain a comprehensive database of 100% malware-free MSMDUN80.DLL files for every applicable version of Office. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download MSMDUN80.DLL Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Office folder location:
    Windows Vista: C:\Program Files (x86)\Common Files\System\Ole DB\
    Windows XP: C:\Program Files\Common Files\System\Ole DB\
    Windows XP: C:\Program Files\Common Files\System\Ole DB\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows Vista.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve MSMDUN80.DLL problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

Download MSMDUN80.DLL Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying MSMDUN80.DLL to your appropriate Windows system directory. Microsoft typically does not release Office DLL files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing MSMDUN80.DLL and all other DLL files for Office. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows Vista
Windows XP

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GAPI32.DLL Microsoft Mail Configuration Library GAPI32 (11.0.4123) 80472 C:\Program Files\Common Files\System\MSMAPI\1033\
OFFRHD.DLL Microsoft Office PROJECT_VERSION Remove Hidden Data Document Inspector Plug ... Microsoft Office 2010 (14.0.4750.1000) 57312 C:\Program Files (x86)\Microsoft Office\Office14\

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