Mfc71.dll not found errors are usually caused when the mfc71 DLL file is deleted or moved, something you may have done on accident or something that another program may have inadvertently caused, possibly by a poor installation or uninstallation.
The mfc71.dll file is related to the Microsoft Visual Studio .NET 2003 program, but is used by many common programs to perform various functions.
Sometimes, though much less often, mfc71.dll errors are caused by viruses or malware installed on your computer.
Depending on what program happens to be causing this problem, you could see the mfc71.dll error in nearly any of Microsoft’s operating systems including Windows 11, Windows 10, Windows 8, Windows 7, Windows Vista, Windows XP, and more.
Mfc71.dll Error Messages
There are a few ways mfc71.dll errors can show up on your computer. Here are some of the more common error messages you might see:
- Mfc71.dll Not Found
- This application failed to start because MFC71.DLL was not found. Re-installing the application may fix this problem.
- Unable to locate component mfc71.dll
- BCMWLTRY.EXE – This application has failed to start because MFC71.DLL was not found.
The error message you see could apply to any application that utilizes this DLL file, of which there are many. Some common software programs and video games that have been known to generate these errors include Corum, AVG Anti-Virus, Adobe Photoshop, StuffIt, Quicken, O2Jam, Norton Anti-Virus and Security software, Far Cry, Hitman: Blood Money, and many others.
How to Fix Mfc71.dll Errors
Follow these steps in the order they're listed below to try the more likely fixes first.
Do not download the mfc71.dll DLL file individually from any “DLL download site.” There are many reasons why downloading DLLs from these sites is never a good idea. If you need a copy of this file, it’s always best to obtain it from its legitimate, original source.
Restart your computer. Sometimes mfc71.dll errors are one-time issues and a simple reboot will fix the problem. It’s not a very likely solution, but it’s an easy first step that could just save the day.
Reinstall the program or game. If you receive a “mfc71.dll not found” error when you open a specific application, reinstall the application. The installation should restore this DLL file to its proper location.
Even if you're not asked, be sure to restart your computer after the uninstallation and before the reinstallation. Restarting your computer at this point will help to make sure that any loaded files are cleared from memory and that the uninstallation is totally complete.
Download the latest update to the program. Visit the software program’s website and download the latest service pack, patch, or other update. It’s possible that the mfc71.dll error may have been corrected in an update issued by the program creators.
Install any suggested Windows updates. Certain security and other updates from Microsoft are known to correct issues with or replace the mfc71.dll file.
Scan your computer for viruses and malware. Some mfc71.dll errors are caused by malicious software that found its way into your system.
If you’re using Microsoft Visual Studio .NET 2003 (most people aren’t), visit Microsoft’s website to download the latest update to Visual Studio.
Reinstall the drivers for your Broadcom wireless network card. This solution only applies when your mfc71.dll error is accompanied by a message about the bcmwltry.exe file. You can update these drivers by visiting Broadcom’s website.
Many computer manufacturer’s use Broadcom’s network hardware in their computers, so the best source for drivers, in this case, would be your computer manufacturer’s website. For instance, many Dell, Gateway, and HP computers use Broadcom’s network hardware.
See How to Update Drivers in Windows if you need help. If you can’t find the right driver through the Broadcom website, consider using a free driver updater program.
Need More Help?
If you’re not interested in fixing this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a lot more.