Fix Mbxmaint_ui.exe Errors and Download Now

Last Updated: 07/01/2021
[Time Required for Reading: 3.5 minutes]

Pegasus Mail Mailbox Maintenance Utility files such as mbxmaint_ui.exe utilize the EXE file extension. This file is considered a Win32 EXE (Executable application) file, and was first created by Apache Friends for the XAMPP 5.6.40 software package.

Mbxmaint_ui.exe was initially released with Pegasus Mail 4.7 on 12/22/2014 for the Windows 10 Operating System. The most recent version [file version 4.51] was introduced on 03/08/2019 for XAMPP 5.6.40. Mbxmaint_ui.exe is found in XAMPP 5.6.40 and Pegasus Mail 4.7.

This article discusses complete file details, EXE file troubleshooting instructions for problems with mbxmaint_ui.exe, 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: mbxmaint_ui.exe
File Extension: EXE file extension
Description: Pegasus Mail Mailbox Maintenance Utility
Object File Type: Executable application
File Operating System: Win32
MIME Type: application/octet-stream
User Popularity Rating:
Developer and Software Information
Software Developer: David Harris
Software Program: XAMPP 5.6.40
Legal Copyright: Copyright © David Harris, 1993-2008, all rights reserved.
File Details
Character Set: Windows, Latin1
Language Code: English (U.S.)
File Flags: (none)
File Flags Mask: 0x0000
Entry Point: 0x1000
Code Size: 135168

What are mbxmaint_ui.exe Error Messages?

mbxmaint_ui.exe Runtime Errors

Runtime errors are XAMPP errors that occur during "runtime". Runtime is pretty self-explanatory; it means that these EXE errors are triggered when mbxmaint_ui.exe is attempted to be loaded either when XAMPP is starting up, or in some cases already running. Runtime errors are the most common form of EXE error you will encounter using XAMPP.

In most cases, mbxmaint_ui.exe runtime errors occurring while the program is running will result in the program terminating abnormally. Most of these mbxmaint_ui.exe error messages mean that XAMPP was either unable to locate this file on startup, or the file is corrupt, resulting in a prematurely-aborted startup process. Generally, XAMPP will be unable to start without resolving these errors.

Some of the most common mbxmaint_ui.exe errors include:

  • mbxmaint_ui.exe - Bad Image.
  • mbxmaint_ui.exe Application Error.
  • mbxmaint_ui.exe could not be found.
  • mbxmaint_ui.exe could not be installed.
  • mbxmaint_ui.exe could not be launched. Class not registered.
  • mbxmaint_ui.exe could not be started.
  • mbxmaint_ui.exe failed to initialize properly.
  • mbxmaint_ui.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
  • mbxmaint_ui.exe is not a valid Win32 application.
  • mbxmaint_ui.exe is not running.
  • Cannot find mbxmaint_ui.exe.
  • Error starting program: mbxmaint_ui.exe.
  • Faulting Application Path: mbxmaint_ui.exe.
  • The file mbxmaint_ui.exe is missing or corrupt.
  • Windows failed to start - mbxmaint_ui.exe.
System Error

The program can’t start because mbxmaint_ui.exe is missing from your computer. Try reinstalling the program to fix this problem.

Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

Finding the source of the mbxmaint_ui.exe error is key to properly resolving these errors. Although most of these EXE errors affecting mbxmaint_ui.exe will happen during startup, occasionally you will encounter a runtime error while using XAMPP 5.6.40. This can occur due to poor programming on behalf of David Harris, conflicts with other software or 3rd-party plug-ins, or caused by damaged and outdated hardware. Also, these types of mbxmaint_ui.exe errors can occur if it has been accidentally moved, deleted, or corrupted by a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix mbxmaint_ui.exe 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 mbxmaint_ui.exe 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 mbxmaint_ui.exe error, please proceed to the Step 2 below.

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

You can uninstall XAMPP 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 XAMPP 5.6.40 and click "Uninstall"
  5. Follow the prompts for uninstallation.

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

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

XAMPP 5.6.40

Apache Friends

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 mbxmaint_ui.exe 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 mbxmaint_ui.exe 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 mbxmaint_ui.exe 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 mbxmaint_ui.exe file version. We maintain a comprehensive database of 100% malware-free mbxmaint_ui.exe files for every applicable version of XAMPP. 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 mbxmaint_ui.exe Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate XAMPP folder location:
    Windows 10: C:\xampp\MercuryMail\
    Windows 10: C:\PMAIL\Programs\
  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 10.

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

CAUTION : We strongly advise against downloading and copying mbxmaint_ui.exe to your appropriate Windows system directory. Apache Friends typically does not release XAMPP EXE 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 mbxmaint_ui.exe and all other EXE files for XAMPP. An incorrectly installed EXE file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10

Files Related to mbxmaint_ui.exe

EXE Files Related to mbxmaint_ui.exe

File Name Description Software Program (Version) File Size (bytes) File Location
perl.exe Windows Executable XAMPP 5.6.40 39424 C:\xampp\perl\bin\
SetReg.exe Windows Executable XAMPP 5.6.40 60600 C:\xampp\MercuryMail\
sqlite3.exe Windows Executable XAMPP 5.6.40 475136 C:\xampp\MercuryMail\
FileZillaServer.exe FileZilla Server FileZilla Server (0, 9, 41, 0) 632320 C:\xampp\FileZillaFTP\
xampp-windows-x64-5.6.... Windows Executable XAMPP 5.6.40 139346200 C:\Users\Tester\Downloads\

Other Files Related to mbxmaint_ui.exe

File Name Description Software Program (Version) File Size (bytes) File Location
setupact.log Log XAMPP 5.6.40 62521 C:\Windows\Panther\UnattendGC\
setupact.log Log XAMPP 5.6.40 27062 C:\Windows\System32\Sysprep\Panther\
WmiApRpl.ini Windows Initialization XAMPP 5.6.40 29736 C:\Windows\inf\WmiApRpl\0009\
BootCKCL.etl Microsoft Event Trace Log XAMPP 5.6.40 17825792 C:\Windows\System32\wdi\LogFiles\
ntuser.dat Game Data XAMPP 5.6.40 1310720 C:\Users\Tester\


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