Microsoft Office DLL MSONSEXT.DLL

Download and Repair DLL Errors: MSONSEXT.DLL

Last Updated: 11/28/2023
[Average Read Time: 4.5 minutes]

DLL files such as MSONSEXT.DLL are categorized as Win32 DLL (Dynamic link library) files. As a Microsoft Web Folders file, it was created for use in SharePoint Portal Server by Microsoft.

The first version of MSONSEXT.DLL for Windows XP was introduced on 10/25/2001 in Windows XP. The newest file release date for Office 2003 was 08/19/2003 [version 11.0.5510.0].

This article discusses complete file details, DLL file troubleshooting instructions for problems with MSONSEXT.DLL, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	MSONSEXT.DLL
File Extension:	DLL file extension
Description:	Microsoft Web Folders
Object File Type:	Dynamic link library
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Microsoft Corporation
Software Program:	SharePoint Portal Server
Legal Copyright:	Copyright (c) 2001-2003 Microsoft Corporation. All rights reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x5a512
Code Size:	809472

View Other MSONSEXT.DLL Information

File Info	Description
File Size:	1263 kB
File Modification Date/Time:	2017:05:10 20:58:07+00:00
File Inode Change Date/Time:	2017:11:05 07:01:42+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2003:07:11 06:42:07+00:00
PE Type:	PE32
Linker Version:	7.10
Code Size:	809472
Initialized Data Size:	475648
Uninitialized Data Size:	0
Entry Point:	0x5a512
OS Version:	4.0
Image Version:	0.0
Subsystem Version:	4.0
Subsystem:	Windows command line
File Version Number:	11.0.5510.0
Product Version Number:	11.0.5510.0
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Microsoft Web Folders
File Version:	11.0.5510.0
Internal Name:	msonsext.dll
Legal Copyright:	Copyright (c) 2001-2003 Microsoft Corporation. All rights reserved.
Original Filename:	msonsext.dll
Product Name:	SharePoint Portal Server
Product Version:	11.0.5510.0
Comments:	Microsoft Web Folders
Legal Trademarks:	Microsoft (R) is a registered trademark of Microsoft Corporation...Windows(TM) is a trademark of Microsoft Corporation.

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are MSONSEXT.DLL Error Messages?

Dynamic Link Library MSONSEXT.DLL Errors

MSONSEXT.DLL is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like MSONSEXT.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 MSONSEXT.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 MSONSEXT.DLL is attempted to be loaded either when Office is starting up, or in some cases already running. Some of the most common MSONSEXT.DLL errors include:

Access Violation at address - MSONSEXT.DLL.
MSONSEXT.DLL could not be found.
Cannot find C:\Program Files\Common Files\Microsoft Shared\Web Folders\MSONSEXT.DLL.
Cannot register MSONSEXT.DLL.
Cannot start Office. A required component is missing: MSONSEXT.DLL. Please install Office again.
Failed to load MSONSEXT.DLL.
The application has failed to start because MSONSEXT.DLL was not found.
The file MSONSEXT.DLL is missing or corrupt.
This application failed to start because MSONSEXT.DLL was not found. Re-installing the application may fix this problem.

Your MSONSEXT.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, MSONSEXT.DLL file corruption could be caused from a power outage when loading Office, system crash while loading MSONSEXT.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.

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How to Fix MSONSEXT.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 MSONSEXT.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):

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

If the Step 1 fails to resolve the MSONSEXT.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):

Hit the Windows Start button
In the search box, type "Uninstall" and press "ENTER".
In the search results, find and click "Add or Remove Programs"
Find the entry for Office 2003 and click "Uninstall"
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 2003

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 MSONSEXT.DLL error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

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

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

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If Those Steps Fail: Download and Replace Your MSONSEXT.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 MSONSEXT.DLL file version. We maintain a comprehensive database of 100% malware-free MSONSEXT.DLL files for every applicable version of Office. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download MSONSEXT.DLL Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate Office folder location:

Windows XP: C:\Program Files\Common Files\Microsoft Shared\Web Folders\
Windows XP: C:\Program Files\Common Files\Microsoft Shared\Web Folders\
Windows XP: C:\Program Files\Common Files\Microsoft Shared\Web Folders\
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 XP.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve MSONSEXT.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.

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

CAUTION : We strongly advise against downloading and copying MSONSEXT.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 MSONSEXT.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.

Office XP

File Name

Software Version

File Version

Architecture

MSONSEXT.DLL

10.145.3810.0

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows XP
Software:	SharePointPortalServer
Software Version:	10.145.3810.0
File Version:	10.145.3810.0
File Size:	1318912
File Date:	05/10/2017
MD5 Checksum:	77264964a2b836234341006159fe89a3
SHA1 Checksum:	fc67f05c0b3c5eeb20109c89fa3c990ff2f12f4f
SHA256 Checksum:	99c660261f9f015ea3f87ae52259d7578d183e804a8ae02df89f7bfce85892f8
CRC32:
File Directory Location:	C:\Program Files\Common Files\Microsoft Shared ...

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	5.0
Initialized Data Size:	487424
Linker Version:	6.20
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows command line
Subsystem Version:	4.0
File Modification Date/Time:	05/10/2017

Office 2003

File Name

Software Version

File Version

Architecture

MSONSEXT.DLL

11.0.5510.0

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows XP
Software:	SharePoint Portal Server
Software Version:	11.0.5510.0
File Version:	11.0.5510.0
File Size:	1292872
File Date:	05/10/2017
MD5 Checksum:	bdbf48d13c5343cced93e675effdb72c
SHA1 Checksum:	58332f29899fe79001b2be30f72ee897388b8930
SHA256 Checksum:	dcf5ec17efedaccc1a6ba4f8aeaa829e1b6306b4d8387a68792d8356d164ee85
CRC32:
File Directory Location:	C:\Program Files\Common Files\Microsoft Shared ...

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	475648
Linker Version:	7.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows command line
Subsystem Version:	4.0
File Modification Date/Time:	05/10/2017

Windows XP

File Name

Software Version

File Version

Architecture

MSONSEXT.DLL

9.0.0.5318

9.0.5318

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows XP
Software:	Microsoft Office
Software Version:	9.0.0.5318
File Version:	9.0.5318
File Size:	561209
File Date:	05/20/2001
MD5 Checksum:	69f2733298c69cbe2ab585d245659a9b
SHA1 Checksum:	5cfc123ee5c769fe9c4016107b643bf8538cb2b5
SHA256 Checksum:	f112a9cdab27013174c2f2e839c6e9ca150c65d43b768496e9c3c90d1efcf865
CRC32:
File Directory Location:	C:\Program Files\Common Files\Microsoft Shared ...

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	311296
Linker Version:	6.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	05/20/2001

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Other Files Related to MSONSEXT.DLL

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows 10	5957	C:\Windows\L2Schemas\
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