Skip to main content
Adobe Photoshop Family

3 Messages

 • 

110 Points

Thu, Oct 19, 2017 11:38 AM

Lightroom Classic: Failed to open: CRClient.dll Error 0xc0000020

After an upgrade to Lightroom Classic CC, Lightroom failed to open. This error message was received: Lightroom classic CC|CRCclient.dll is either not designed to run on windows or contains an error.... Error status 0xc0000020.

Responses

Official Solution

Employee

 • 

46 Messages

 • 

1.4K Points

3 years ago

Hi Kevin,

Please refer this documentation https://helpx.adobe.com/lightroom/kb/bad-image-error-0xc0000020.html and let us know if that helps. 

Thanks, 
Akash Sharma

9 Messages

 • 

182 Points

3 years ago

This happened to me also, so I’m glad I’m not alone.
Regards
BobD

3 Messages

 • 

110 Points

3 years ago

My old Lightroom was also taken away. Anyone know how to get it back.

3 Messages

 • 

110 Points

After deleting Lightroom classic then backing up my old Lightroom catalog files and reinstalling Lightroom classic everything is fine. I should have known that it's unwise to delete any programs before you see that the new version is working properly. Thank you all for your responses I hope the above suggestion help some of you get your Lightroom classic up and running looks like a wonderful program a great Improvement.

62 Messages

 • 

1.3K Points

3 years ago

Try to reinstall Lightroom Classic. 

9 Messages

 • 

182 Points

3 years ago

I installed LR CC2015 from the CC control panel, there is an option to do this. However, it seems to have none of the updates applied. I will continue to use this until Adobe sort out the problem that I had with LR Classic CC
BobD

Adobe Administrator

 • 

778 Messages

 • 

16.7K Points

3 years ago

Hi Fred and Bob,

Sorry about the error when starting Lightroom Classic -- Which version of Windows are you using?
Did either of you try uninstalling, and reinstalling Lightroom Classic?
Does a reboot of Windows make any difference? 

Regards
PG

1 Message

 • 

62 Points

Same issue - cannot get lightroom classic to open - and I cannot work out in the new lightroom how to edit my pictures held on the hard drive

1 Message

 • 

60 Points

I am getting a Crash report as soon as I try to open the program... Was working perfectly yesterday...
Windows 10 machine...

9 Messages

 • 

182 Points

3 years ago

Hi Pete, I’m using Win10. I updated LR from the CC control panel and when I clicked on the icon, I got the error message as in Fred’s post. I uninstalled LR Classic CC and tried again, same thing. I have now installed LR 2015CC and this is ok. A reboot of Windows did not have any effect.
Regards
BobD

3 Messages

 • 

140 Points

3 years ago

I have the exact same problem and neither a reinstall or restart fixes the problem.  I can run the updated Photoshop and every other program on the computer except Lightroom Classic.

1 Message

 • 

60 Points

3 years ago

Me too!!!

3 Messages

 • 

140 Points

3 years ago

I have fixed my problem.  It turned out that Mcafee was somehow inferring with those dll files mentioned in the error messages.  I paused Mcafee, deleted Lightroom, and then reinstalled it.  It was up and working without any problems.  I went to Mcafee's exceptions page and entered all the dll files that were showing up in the error messages as trusted files so that the Mcafee software would ignore them.  It solved my problem.

Adobe Administrator

 • 

778 Messages

 • 

16.7K Points

Thanks for the update Jim! I wonder if this is the same case for the others experiencing this issue as well?

11 Messages

 • 

154 Points

No. Didn’t work for me. I now get installation failed (on reinstall. ).

9 Messages

 • 

182 Points

I’ll try this tonight and let you all know how I get on.

2 Messages

 • 

70 Points

Looks like this might work for me.  I have re-installed but forgot to screenshot the other error messages.  I had three errors.  Does anyone happen to have those error messages on hand so that I can enter them into Mcafee?  Thanks.

2 Messages

 • 

70 Points

You're a legend Jim!  I was pulling my hair out.  Thank-you. :) 

Adobe Administrator

 • 

778 Messages

 • 

16.7K Points

3 years ago

Is anybody still seeing this error message?

If so, have you tried Uninstalling Lightroom Classic, disabling McAfee, then Reinstalling Lightroom Classic from the CC Desktop application?

Any progress after that sequence of steps?

Let us know here.
Regards
Pete

5 Messages

 • 

140 Points

3 years ago

Same error message.  Same problem here.  I pause Mcaffee and uninstalled, then reinstalled Lightroom.  That fixed it for one day.  Then today I tried to start it up again and got the same error message.

Adobe Administrator

 • 

778 Messages

 • 

16.7K Points

Interesting, thanks for the update Annie, Does it start up again if you disable McAfee prior to launch?

Seems others are also adding the DLLs referenced in the error to McAfee's exception list, Does that help you at all?

Regards
Pete

5 Messages

 • 

140 Points

I finally discovered that the problem might be linked to another security filter called K9 that I had installed. I deleted K9, then temporarily disabled McAfee, reinstalled lightroom, and listed it as an exception to McAfee's virus scan. It works so far so good.

9 Messages

 • 

182 Points

Did you list Lightroom.exe as the exception, or the .dll files mentioned in the error message?

5 Messages

 • 

140 Points

Lightroom.exe. I did not reinstall K9.

Adobe Administrator

 • 

778 Messages

 • 

16.7K Points

Great to know it's working for you Annie, thanks for letting us know K9filter may have been involved. 

A few questions around K9-- Did you install K9 intentionally? Did you use it as a Parental Control on this computer? Do you still need it?

Regards
Pete

73 Messages

 • 

1.2K Points

3 years ago

I just started seeing this error. I have Lightroom Classic CC running on Windows 10 Version 1709. I have been starting Photoshop from Lightroom on this version of Windows for about a week. For example, earlier today I used Lightroom to edit several raw photos. I exported them as jpg from Photoshop. Tonight I copied two new raw photos to my harddrive using File Explorer. I edited the two photos and exported them as png from Lightroom Classic CC. I then decided I wanted to edit the raw photos in PSE. I to start Photoshop CC 2018 from Lightroom. I got the error message described in this thread. I restarted the PC and tried again. Same error. I have not tried the suggestion about McAfee. I will try it tomorrow. It doesn't make sense that McAfee would get in the way of this dll when it has allowed it previously. But then this error suddenly showing up doesn't make sense.

3 Messages

 • 

92 Points

3 years ago

I have had nothing but problems with LR and PS since the upgrade. First, it was PS that would not open. I would get error messages every time. I got onto Adobe help and they remotely took over my computer. Did the disable McAfee uninstall, reinstall all programs thing. This worked for a little while. Then, the only way I could access PS was directly from LR. Then I couldn't get on LR without the same error message shown above. Back to Adobe Help, who again remotely took over my computer. This person found that the Microsoft Visual C++ files were corrupt. After 90 minutes, everything was fixed again. Until the other day, when again I got the error message trying to open LR. Having watched the last remote take over, and repair I kinda knew what to do. So I fixed the Microsoft Visual C++ files...again, uninstalled and reinstalled LR and so far it's still working. Hopefully somebody, somewhere fixes this bug. 

1 Message

 • 

60 Points

3 years ago

I'm having the same problem with the exact same error message.  I've uninstalled Lightroom twice, and reinstalled it.  Each time the program runs for a while.  I'm using McAffee paid version on windows 10 Creator's Edition.  Agree, it's a nuisance.  Hope this gets fixed soon