P: Lightroom launch mfc140u.dll missing file on Windows

[ianp1958]

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

[Sameer K · Accepted solution]

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

[Peter28944234vmbg]

Sameer.  I have the same problem.  I have followed your instructions - uninstalled the MSVC++ apps and I have downloaded the new ones.  But I cannot for the life of me work out how to install those new ones.  The only instructions I can find are about downloading from the Windows store.  So how do I install these files which I have already downloaded?  Thanks.  Peter

[Peter28944234vmbg]

Sameer.  Update on the above.  I had another look at your suggestion and realised that you were saying that it was the MSVC++ which had to be reinstalled.  So I downloaded the files from the link you gave.  Then I went onto the net and reinstalled the MSVC++ from Microsoft.  Now I have Lightroom back!  This restatement might help others with the same problem.  Thanks for your help. Peter

[Sameer K]

Thanks for confirming this @Peter28944234vmbg. Glad to know it has helped.

Please feel free to reach us when you need help. Thanks!

Sameer K.

[johnm70906243]

Thank you for the updated instructions.  

[kieranc57085614]

Yes. That worked. Thanks for the solution

[mary24177447aro2]

Had the same problem today.  After being on a chat with Microsoft for over an hour I disconnected and ran these steps.   Got my Lightroom back.   Yay!!

[Taica30707928sxhz]

Hello Sameer, 

I have followed your above instructions up to downloading all the MSVC++ packages and unzipping them, but I don't know how to reinstall them. Please help. Thank you, Taica Patience

[Dimitar30944636tncr]

Worked for me, thank you!

[Mieke31244488843k]

it worked!!! Thanks!

[Suet Yu]

Hello Samer

Thanks for your tips, now it works but some of the reinstallation of the MSVC++ has errors.  But anyway, it works for me now. Many thanks

Suet

[Jenna31858144qy2s]

THIS WORKED!!! I was having troubling opening lightroom for the longest time and had to use the web version. thank you so much for your help!

[be_kat_berlin]

thank you for this great description it worked fine for me.
Thanks a lot!

[Karla28800091n44v]

Error message, mfc140u.dll file not found when launching. I've tried reinstalling with no sucess. Please help me fix this. I'm a photographer and need to edit photos for a client.

[Ranjisha Sengupta]

Hi @Karla28800091n44v 

Thanks for highlighting the issue that you are seeing with Lightroom. 

Which version of Lightroom are you using? When do you get the error message?

This issue generally get fixed with re-installation. Let's try some other steps, as you still see the issue.

You can try resetting Lightroom's preferences using the steps mentioned here: https://adobe.ly/2JSym5e.

Please back up your presets prior to resetting the preferences.

Let us know how it goes. 

Best,

Ranjisha

[Olufunto28804339640t]

Hello, i am also having this issue. I have re-installed and removed my preferences but still no luck.

[Sameer K]

Hey @Karla28800091n44v &  @Olufunto28804339640t, I'll help you figure this out.

Try the steps I shared on 6th March & let me know if the issue exists.

Thanks!
Sameer K

[Karla28800091n44v]

My husband got it working. Thank you

[jena67344848]

The same issue happened for me but taking these steps has resolved the problem for me. Thank you!

[Fridasmynta]

Hi, I can´t open LRc, i only get system error, missing file error. I have tried to uninstall but the same error appers. 4 diffrent windows opens with 1 file missing in each; VCRUNTIME140_.dll, mfc140u.dll, MSVCP140.dll, VCRUNTIME140.dll.

Please help me.

Regards Frida

[Kelsey30284016sdrx]

Please someone help!

I have updated my computer. Uninstalled and reinstalled lightroom.

I tried removing and redownloading all the microsoft visual c ++ files. 

Nothing has helped!

[joshuaberling]

I need help my Lightroom does not start up. Not even after reinstalling the creative could itself or lightroom serval times. Also tryed deactivating my anti virus and installing windows and other drivers. Im out of options except for resetting my pc as a whole. 

[Karolina31145313cs6n]

I can't open lightroom on my laptom, reinstalled probably x10 times, could somebody helo please?

[esavarese]

Thank you... It worked...

You just saved my bacon with this info!!!

Much appreciated