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P: Lightroom launch mfc140u.dll missing file on Windows

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Error message, mfc140u.dll file not found when launching, tried reinstalling with no sucess

Windows

Sameer KCorrect answer

Community Manager

Welcome to the Lightroom Community. I'll help you figure this out. The mfc140u.dll is part of Microsoft Visual Studio.

Please try these steps & let me know how it goes.

In the Creative Cloud app, press CTRL + ALT + T (Win) to launch Creative Cloud Troubleshooter & select 'Close Creative Cloud and related processes' > click on Go.
Go to 'Add or Remove programs' in Windows search & find all the installations of Microsoft Visual C++ Redistributable (all years).
Uninstall them completely. Even if there is an option to repair them, please uninstall all the existing MSVC++ packages.
Download a fresh package of installers for MSVC++ from this link: Microsoft Learn: Latest Support VC Redist.
Right-click the downloaded file and select Extract All.
Reinstall all packages (32bit & 64bit) & then restart the computer.

Let me know how it goes from here. Thanks!

Sameer K

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Frank Wm Patout

Participant

I can not open Lightroom Classic. Note" The code execution cannot proceed because mfc140.dll was not found."

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MAP1737

Participant

Thanks, this worked for me 👍

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PHc

Participant

J’utilise windows 1, depuis le 28/02/2026 lightroom classic ne s’ouvre plus avec mfc140u.dll missing.

J’ai corrigé le problème de C++ en le reinstallant. Mais le n’arrive plus à ouvrir lightroom.

Il n’y a aucun message.

J’ai voulu reinstaller lightroom classic . Le fichier télechargé ouvre une page internet

je n’y trouve pas comment installer sur mon PC lightroom classic.

comment faut il faire ?

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schdlera

Participant

It didn’t work for me :(

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anthonyfoote

Participant

code mfc140u.dll the code keeps coming up and will not let me open

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schdlera

Participant

I’m having the same issue, did you figure it out?

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Sameer K

Community Manager

Please follow the correct answer in this post and check if it helps.

Thanks!
Sameer K

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Hynciik

Participant

Unfortunately, now there are even more files that are missing :((

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Kony Mendiola

Participant

Hola, tengo el mismo problema, iba hacer lo que señala sameer k pero vi tu comentario y me eche para atras. Nose si ya pudiste con alguna solucion?

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Xhuxha Ambrocio

Participant

El comentario de GujaratiKanudo, me funcionó.

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Gabi-Muc

Participant

Beim Aufruf kommt die Meldung: Die Ausführung des Codes kann nicht fortgesetzt werden, da MSVP140_CODECVT_IDS.dll” nicht gefunden wurde. Was ist zu tun? Bis gestern funktioniere alles einwandfrei.

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G

GujaratiKanudo

Participant

Simply Update your VC Runtime files by going here VC_Runtimes and download both x32-x64 Runtime adn apply update..

(restart if needed) and you are Done.

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