MFC40u.dll.mui: How to Fix, Download, and Update

Last Updated: 12/03/2024
[Time Needed for Reading: ~4-6 minutes]

The development of Microsoft (R) Visual C++ by Microsoft prompted the latest creation of MFC40u.dll.mui. It is also known as a MFCDLL Shared Library - Retail Version file (file extension MUI), which is classified as a type of Win32 DLL (Dynamic link library) file.

MFC40u.dll.mui was initially released with Windows Vista on 11/08/2006 for the Windows Vista Operating System. The most recent version [file version 4.1.6140] was introduced on 07/29/2015 for Windows 10. MFC40u.dll.mui is included with Windows 10, Windows 8.1, and Windows 8.

Continue reading below to discover detailed file information, MUI file troubleshooting, and free downloads of several versions of MFC40u.dll.mui.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	MFC40u.dll.mui
File Extension:	MUI file extension
Description:	MFCDLL Shared Library - Retail Version
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:	Microsoft (R) Visual C++
Legal Copyright:	Copyright (C) Microsoft Corp. 1993-1995

File Details
Character Set:	Windows, Latin1
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x0000

View Other MFC40u.dll.mui Information

File Info	Description
File Size:	29 kB
File Modification Date/Time:	2011:04:12 07:36:25+00:00
File Inode Change Date/Time:	2017:11:05 07:07:52+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2008:10:09 23:57:06+00:00
PE Type:	PE32
Linker Version:	9.0
Code Size:	0
Initialized Data Size:	29184
Uninitialized Data Size:	0
Entry Point:	0x0000
OS Version:	5.0
Image Version:	0.0
Subsystem Version:	5.0
Subsystem:	Windows GUI
File Version Number:	4.1.0.6140
Product Version Number:	4.1.0.1
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:	Windows, Latin1
Company Name:	Microsoft Corporation
File Description:	MFCDLL Shared Library - Retail Version
File Version:	4.1.6140
Internal Name:	MFCDLL
Legal Copyright:	Copyright (C) Microsoft Corp. 1993-1995
Original Filename:	MFC40.DLL.MUI
Product Name:	Microsoft (R) Visual C++
Product Version:	4.1.001
Legal Trademarks:

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

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What are MFC40u.dll.mui Error Messages?

Dynamic Link Library MFC40u.dll.mui Errors

MFC40u.dll.mui is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like MFC40u.dll.mui, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like 3DViewer.ResourceResolver.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same MFC40u.dll.mui 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 MUI 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 MFC40u.dll.mui is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common MFC40u.dll.mui errors include:

Access Violation at address - MFC40u.dll.mui.
MFC40u.dll.mui could not be found.
Cannot find C:\Windows\System32\en-US\MFC40u.dll.mui.
Cannot register MFC40u.dll.mui.
Cannot start Windows. A required component is missing: MFC40u.dll.mui. Please install Windows again.
Failed to load MFC40u.dll.mui.
The application has failed to start because MFC40u.dll.mui was not found.
The file MFC40u.dll.mui is missing or corrupt.
This application failed to start because MFC40u.dll.mui was not found. Re-installing the application may fix this problem.

Your MFC40u.dll.mui file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, MFC40u.dll.mui file corruption could be caused from a power outage when loading Windows, system crash while loading MFC40u.dll.mui, 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 MFC40u.dll.mui 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 MFC40u.dll.mui 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 MFC40u.dll.mui error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing MFC40u.dll.mui file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt MFC40u.dll.mui files (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "cmd" but DO NOT PRESS "ENTER".
Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
You'll be prompted with a permission dialog box.
In the box, click "YES".
You should have a black screen with a blinking cursor.
In that black screen, type "sfc /scannow" and hit "ENTER".
SFC will begin scanning for MFC40u.dll.mui issues and any other system file problems.
Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

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

sfc /scannow

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 MFC40u.dll.mui 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 MFC40u.dll.mui 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 MFC40u.dll.mui 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 MFC40u.dll.mui file version. We maintain a comprehensive database of 100% malware-free MFC40u.dll.mui files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download MFC40u.dll.mui Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy the file into the appropriate directory for your Windows version:

Windows Vista: C:\Windows\SysWOW64\en-US\
Windows 7: C:\Windows\SysWOW64\en-US\
Windows 8: C:\Windows\System32\en-US\
Windows 8.1: C:\Windows\System32\en-GB\
Windows 10: C:\Windows\System32\en-US\

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 MFC40u.dll.mui 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 MFC40u.dll.mui Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying MFC40u.dll.mui to your appropriate Windows system directory. Microsoft typically does not release Windows MUI 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 MFC40u.dll.mui and all other MUI files for Windows. An incorrectly installed MUI file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10

File Name

Software Version

File Version

Architecture

MFC40u.dll.mui

4.1.0.1

4.1.6140

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Microsoft (R) Visual C++
Software Version:	4.1.0.1
File Version:	4.1.6140
File Size:	29696
File Date:	04/12/2011
MD5 Checksum:	fb3b26477b46979948864e29a7a77fb5
SHA1 Checksum:	32a5307f99ef2cc57010ae7564846fb4880f4a3c
SHA256 Checksum:	5cee5bc6057f3b8d9072ce717b72e774c937b3082330172b816edb8f7a8e1502
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	29184
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.0
File Modification Date/Time:	04/12/2011

Windows Vista

File Name

Software Version

File Version

Architecture

MFC40u.dll.mui

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	29696
MD5 Checksum:	dc2f064ea4139a4ee93b17d7cb325fe2
SHA1 Checksum:	436f7c90e562f71521082545bf8a049d2b921dd0
SHA256 Checksum:	87c77903321817bec883ee17cc9ffc89c01d84060928f2fe728cab52465fbc9e
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
There is no information available.

Windows 8.1

File Name

Software Version

File Version

Architecture

MFC40u.dll.mui

4.1.0.1

4.1.6140

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft (R) Visual C++
Software Version:	4.1.0.1
File Version:	4.1.6140
File Size:	29696
File Date:	11/21/2014
MD5 Checksum:	7f6024f9317414bc41cd109b8b3bd889
SHA1 Checksum:	35b6570c475eff924fda0537fefecad1c2673929
SHA256 Checksum:	91c0240d1c8878a78c64f67bd8aa6f585a0548953460d248c2c84aeff8c45aef
CRC32:
File Directory Location:	C:\Windows\System32\en-GB\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	29184
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.0
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

MFC40u.dll.mui

4.1.0.1

4.1.6140

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Microsoft (R) Visual C++
Software Version:	4.1.0.1
File Version:	4.1.6140
File Size:	29696
File Date:	04/12/2011
MD5 Checksum:	fb3b26477b46979948864e29a7a77fb5
SHA1 Checksum:	32a5307f99ef2cc57010ae7564846fb4880f4a3c
SHA256 Checksum:	5cee5bc6057f3b8d9072ce717b72e774c937b3082330172b816edb8f7a8e1502
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	29184
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.0
File Modification Date/Time:	04/12/2011

Windows 7

File Name

Software Version

File Version

Architecture

MFC40u.dll.mui

4.1.0.1

4.1.6140

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft (R) Visual C++
Software Version:	4.1.0.1
File Version:	4.1.6140
File Size:	29696
File Date:	04/12/2011
MD5 Checksum:	fb3b26477b46979948864e29a7a77fb5
SHA1 Checksum:	32a5307f99ef2cc57010ae7564846fb4880f4a3c
SHA256 Checksum:	5cee5bc6057f3b8d9072ce717b72e774c937b3082330172b816edb8f7a8e1502
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	0.0
Initialized Data Size:	29184
Linker Version:	9.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.0
File Modification Date/Time:	04/12/2011

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