Microsoft Windows DLL mfc40.dll

Fixing DLL Errors: Mfc40.dll Download and Repair

Last Updated: 11/27/2023
[Reading Time Required: 3.5 minutes]

MFCDLL Shared Library - Retail Version files, such as mfc40.dll, are considered a type of Win32 DLL (Dynamic link library) file. They are associated with the DLL file extension, developed by Microsoft for Microsoft (R) Visual C++.

The first release of mfc40.dll for the Windows Vista platform was on 11/08/2006 for Windows Vista. The latest file version for Windows 10 is v4.1.6140 released on 07/29/2015. mfc40.dll is found in Windows 10, Windows XP, and Windows Vista.

Below, you find comprehensive file information, instructions for simple DLL file troubleshooting, and list of free mfc40.dll downloads for each available file version.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	mfc40.dll
File Extension:	DLL 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:	0x6c44
Code Size:	610304

View Other mfc40.dll Information

File Info	Description
File Size:	903 kB
File Modification Date/Time:	2013:08:21 23:35:15+00:00
File Inode Change Date/Time:	2017:11:05 07:04:30+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	1996:07:11 19:55:30+00:00
PE Type:	PE32
Linker Version:	3.10
Code Size:	610304
Initialized Data Size:	313344
Uninitialized Data Size:	0
Entry Point:	0x6c44
OS Version:	4.0
Image Version:	4.1
Subsystem Version:	4.0
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
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 mfc40.dll Error Messages?

Dynamic Link Library mfc40.dll Errors

mfc40.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like mfc40.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like sapisvr.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same mfc40.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 mfc40.dll is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common mfc40.dll errors include:

Access Violation at address - mfc40.dll.
mfc40.dll could not be found.
Cannot find C:\Windows\System32\mfc40.dll.
Cannot register mfc40.dll.
Cannot start Windows. A required component is missing: mfc40.dll. Please install Windows again.
Failed to load mfc40.dll.
The application has failed to start because mfc40.dll was not found.
The file mfc40.dll is missing or corrupt.
This application failed to start because mfc40.dll was not found. Re-installing the application may fix this problem.

Your mfc40.dll 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, mfc40.dll file corruption could be caused from a power outage when loading Windows, system crash while loading mfc40.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 mfc40.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 mfc40.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 mfc40.dll error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing mfc40.dll 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 mfc40.dll 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 mfc40.dll 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 mfc40.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 mfc40.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 mfc40.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 mfc40.dll file version. We maintain a comprehensive database of 100% malware-free mfc40.dll 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 mfc40.dll 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 XP: C:\WINDOWS\system32\dllcache\
Windows XP: C:\Windows\System32\
Windows Vista: C:\Windows\SysWOW64\
Windows 7: C:\Windows\SysWOW64\
Windows 8: C:\Windows\System32\
Show 2 more directories +

Windows 8.1: C:\Windows\System32\
Windows 10: C:\Windows\System32\

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 mfc40.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 mfc40.dll Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying mfc40.dll to your appropriate Windows system directory. Microsoft typically does not release Windows 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 mfc40.dll and all other DLL files for Windows. 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 10

File Name

Software Version

File Version

Architecture

mfc40.dll

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:	924944
File Date:	08/21/2013
MD5 Checksum:	8bbc59ae8497d0bbee8d66b74c7db971
SHA1 Checksum:	5987fe05b51dfcd49bcb58f5755fd5b0c166e0b2
SHA256 Checksum:	c8aacb7314fe061b16c0d1961f4071e144be9aa44e7e00cd89b9b6581aad6430
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	4.1
Initialized Data Size:	313344
Linker Version:	3.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	08/21/2013

Windows XP

File Name

Software Version

File Version

Architecture

mfc40.dll

4.1.0.1

4.1.6140

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows XP
Software:	Microsoft (R) Visual C++
Software Version:	4.1.0.1
File Version:	4.1.6140
File Size:	924432
File Date:	04/14/2008
MD5 Checksum:	8f4ce043f4f6401eb05d21e8ec16d566
SHA1 Checksum:	79463acd32a7884da32479273029d14416d640a8
SHA256 Checksum:	dbf4c26c0f93b7760851ee42278c82d064446df21d062dab1c02091fdaad1f06
CRC32:
File Directory Location:	C:\WINDOWS\system32\dllcache\ C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	4.1
Initialized Data Size:	326144
Linker Version:	3.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	04/14/2008

Windows Vista

File Name

Software Version

File Version

Architecture

mfc40.dll

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	924944
MD5 Checksum:	37919ece8b3c46dc5399ef147adf2701
SHA1 Checksum:	cd11d13ea6aa3d974e170860843ded69f286ea47
SHA256 Checksum:	6ee565fd9d3fd8d4a96bbc9617ff2b9318048c910006299cf1df93c568d51de4
CRC32:
File Directory Location:	C:\Windows\SysWOW64\

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

Windows 8.1

File Name

Software Version

File Version

Architecture

mfc40.dll

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:	924944
File Date:	08/21/2013
MD5 Checksum:	8bbc59ae8497d0bbee8d66b74c7db971
SHA1 Checksum:	5987fe05b51dfcd49bcb58f5755fd5b0c166e0b2
SHA256 Checksum:	c8aacb7314fe061b16c0d1961f4071e144be9aa44e7e00cd89b9b6581aad6430
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	4.1
Initialized Data Size:	313344
Linker Version:	3.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	08/21/2013

Windows 8

File Name

Software Version

File Version

Architecture

mfc40.dll

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:	924944
File Date:	07/26/2012
MD5 Checksum:	f09a46b2a6cc7ec608b11663a2f18eb9
SHA1 Checksum:	86482d04fe8a4360cb96c8d523e0811e6d269b65
SHA256 Checksum:	44fce02bbc77fc78cd543968994fa59ffe195fc5590253a97616a1d7aaeff0a6
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	4.1
Initialized Data Size:	313344
Linker Version:	3.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	4.0
File Modification Date/Time:	07/26/2012

Windows 7

File Name

Software Version

File Version

Architecture

mfc40.dll

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
File Size:	954752
MD5 Checksum:	2a6c1373d88b6d5933383b9f5c034cb9
SHA1 Checksum:	a3866df9c59ddd238e31aa290d8eb3acea63e577
SHA256 Checksum:	b44b89aa6d5dc1790e1e6043ff2569f1ec31142e7659c42735a3e04c2256ffed
CRC32:
File Directory Location:	C:\Windows\SysWOW64\

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

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Files Related to mfc40.dll

DLL Files Related to mfc40.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
iscsidsc.dll	iSCSI Discovery api	Microsoft® Windows® Operating System (6.3.9600.17415)	55296	C:\Windows\Boot\EFI\fi-FI\
MPG4DECD.DLL	Windows Media MPEG-4 Video Decoder	Microsoft® Windows® Operating System (6.2.9200.16384)	251904	C:\Windows\System32\
MSTTSCommon.dll	Dynamic Link Library	Windows 7	41472	C:\Windows\inf\WmiApRpl\0009\
clbcatq.dll	Dynamic Link Library	COM Services (03.00.00.4414)	498688	C:\Windows\inf\
NlsData0002.dll	Dynamic Link Library	Windows Vista	1965056	C:\Windows\inf\

Other Files Related to mfc40.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows 8	5957	C:\Windows\L2Schemas\
OneX_v1.xsd	XML Schema Definition	Windows 8.1	5957	C:\Windows\L2Schemas\
OneX_v1.xsd	XML Schema Definition	Windows Vista	5957	C:\Windows\L2Schemas\
OneX_v1.xsd	XML Schema Definition	Windows 10	5957	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 10	6201	C:\Windows\L2Schemas\

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