Fix, Download, and Update MAPI.DLL

Last Updated: 11/27/2023
[Average Article Time to Read: 4.7 minutes]

The development of Office XP by Microsoft prompted the latest creation of MAPI.DLL. It is also known as a Dynamic Link Library file (file extension DLL), which is classified as a type of Win16 EXE (Dynamic Link Library) file.

The first version of MAPI.DLL for Office XP was seen on 05/31/2001 in Windows XP. This file marks the latest update from Microsoft, according to our records.

This article discusses complete file details, DLL file troubleshooting instructions for problems with MAPI.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)


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File Overview


General Information
File Name: MAPI.DLL
File Extension: DLL file extension
File Type: Dynamic Link Library
Description: Dynamic Link Library
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Program: Office XP
Developer: Microsoft
Software: Office
Software Version: XP
File Details
File Size (Bytes): 520128
Oldest File Date: 05/10/2017
Latest File Date: 05/10/2017


What are MAPI.DLL Error Messages?


Dynamic Link Library MAPI.DLL Errors

MAPI.DLL is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like MAPI.DLL, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like SCANOST.EXE - to follow. These files were created so that multiple programs (eg. Office) could share the same MAPI.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 MAPI.DLL is attempted to be loaded either when Office is starting up, or in some cases already running. Some of the most common MAPI.DLL errors include:

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

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 MAPI.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 MAPI.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 MAPI.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 MAPI.DLL file version. We maintain a comprehensive database of 100% malware-free MAPI.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 MAPI.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 XP: C:\Windows\System32\
  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 XP.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve MAPI.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 MAPI.DLL Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying MAPI.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 MAPI.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 XP


Files Related to MAPI.DLL


DLL Files Related to MAPI.DLL

File Name Description Software Program (Version) File Size (bytes) File Location
Microsoft.Office.Power... Dynamic Link Library Office 2016 315072 C:\Users\Tester\AppData\Local\Microsoft\Windows...
Microsoft.ReportingSer... Dynamic Link Library Office 2013 24256 C:\Users\Tester\AppData\Local\Microsoft\Windows...
COMMTB32.DLL Microsoft Button Editor DLL Microsoft Button Editor (01.07.00.00) 54784 C:\Users\Tester\AppData\Local\Microsoft\Windows...
CDOOFF.DLL Microsoft Office Collaboration Data Objects Microoft Office (10.0.2607) 234912 C:\Users\Tester\AppData\Local\Microsoft\Windows...
msolap110.dll Microsoft OLE DB Provider for Analysis Services 11.0 Microsoft SQL Server Analysis Services (11.0.2809.92) 7437504 C:\Users\Tester\AppData\Local\Microsoft\Windows...

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File Name Description Software Program (Version) File Size (bytes) File Location
WWAN_profile_v1.xsd XML Schema Definition Windows 10 6201 C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd XML Schema Definition Windows 8.1 7548 C:\Windows\L2Schemas\
WLAN_profile_v1.xsd XML Schema Definition Windows 8 15591 C:\Windows\L2Schemas\
WLAN_profile_v1.xsd XML Schema Definition Windows Vista 15591 C:\Windows\L2Schemas\
WLAN_policy_v1.xsd XML Schema Definition Windows 7 7405 C:\Windows\L2Schemas\


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