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26

"An Internal Error Occured" when clicking on a PDF and Windows Explorer preview pane is showing.

Explorer ,
Sep 13, 2022 Sep 13, 2022

Hi there,

Running Windows 11, up-to-date system and up-to-date Creative Cloud and Adobe Acrobat DC. I have my preview pane visible when going through my files, and sometime in the last 2 weeks PDFs no longer show up in the preview pane. Instead, windows explorer freezes for a few seconds and then shows an Adobe Acrobat "An Internal Error Occured" pop-up. I tried clearing out my temporary files, and tried creating a "2022" folder in C:\Users\(user)\AppData\Local\Adobe\Acrobat\ which was suggested in this thread. Neither worked. All other file types (.jpg, .doc, etc.) show up in the preview pane just fine. Any suggestions?

 

Screenshot 2022-09-13 134651.png

 

TOPICS
Crash or freeze , General troubleshooting
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3 ACCEPTED SOLUTIONS
Community Beginner ,
Oct 19, 2022 Oct 19, 2022

I FOUND A SOLUTION.

 

I had to go C:\Users\[me]\AppData\Local and right click the Adobe folder, click properties and go to security tab. I had a bunch of left-over "Account Unknown" listed besides my three main ones (System, [me], Admin). I deleted all the account unknowns.

That fixed it for me.

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New Here ,
May 08, 2023 May 08, 2023

This worked, for me! (thank god, what a pain in the a**)
I couldn't find the "AppData" folder, I ended up finding it by clicking "view", then "show" and then toggling on "hidden files".

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New Here ,
Nov 14, 2023 Nov 14, 2023

Me paso lo mismo, entre en la ruto que colocaron y le saque los permisos heredados y borre los los desconocidos y hasta ahora funciona

 

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replies 152 Replies 152
New Here ,
Mar 22, 2023 Mar 22, 2023

Fixed! For real thank you!! Such an irritating error 

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New Here ,
Mar 26, 2023 Mar 26, 2023

Literally a life saver... Thank you SOOO MUCH!

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New Here ,
Apr 21, 2023 Apr 21, 2023

Hooray MarkelRayes! This totally worked! Thank you!

 

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New Here ,
Apr 29, 2023 Apr 29, 2023

checked everything. No "unknown" accounts (only SYSTEM, [me] and Admin. The error is still occuring. Any ideas?

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New Here ,
May 03, 2023 May 03, 2023

This does not work for me as there are only 3 accounts, admin, me and system. Although the disabling the Preview pane stps the error, it means I can't use the preview pane which is a useful tool. Only a work around, not a solution. The problem only occurs for me when clicking on a PDF that has onedrive syncing it. Not my local machine. Microsoft seems to not have any support for this but it's clearly an issue on both sides. Any other solutions other than already shared? Also, what is the cause of it?

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New Here ,
May 08, 2023 May 08, 2023

This worked, for me! (thank god, what a pain in the a**)
I couldn't find the "AppData" folder, I ended up finding it by clicking "view", then "show" and then toggling on "hidden files".

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New Here ,
Mar 15, 2025 Mar 15, 2025
LATEST

Thanksss Dudeee

 

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New Here ,
Jun 14, 2023 Jun 14, 2023

That also worked for me! God bless you! You are an angel

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New Here ,
Aug 18, 2023 Aug 18, 2023

This fix worked for me as well. Thank you.

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New Here ,
Aug 21, 2023 Aug 21, 2023

Hey just wanted to come here and say that while this solution did not work for me, I deleted all files located at "C:\Users\[me]\AppData\Local and right click the Adobe folder" and just deleted them all, then tried running adobe and it finally worked fine. Took me hours of work trying to figure out what could be the issue.

uninstalling and reinstalling didn't work, downloading the latest patch didn't work, permissions were fine, no unknown users in the permissions tab. deleting temp folder didn't work. What finally got this bug resolved for me was deleting that entire file, it rebuilt when i relaunched adobe. I just want to say that if you get an error saying that the file is in use, use task manager to close all instances of adobe including the cloud app, and the update messenger app. 

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Community Beginner ,
Sep 10, 2024 Sep 10, 2024

Thank you!!! This was the only option that worked for me. 

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New Here ,
Sep 27, 2024 Sep 27, 2024

Thank you so much, spent hours and days trying to fix this. Finally i can view and edit documents usin acrobat.

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New Here ,
Nov 12, 2024 Nov 12, 2024

Thank you!  This seems to have solved the problem for me...

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Explorer ,
Aug 22, 2023 Aug 22, 2023

Thank you so much! I think this fixed the problem for me!

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New Here ,
Nov 14, 2023 Nov 14, 2023

Me paso lo mismo, entre en la ruto que colocaron y le saque los permisos heredados y borre los los desconocidos y hasta ahora funciona

 

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New Here ,
Dec 14, 2023 Dec 14, 2023

Even Adobe escalated team could not resolved this entering remotely in to my pc for several hours, but your this technic worked for me within 10 minuits. "MILLIONS OF THANK YOU! !!!!!!!!"

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New Here ,
Feb 02, 2024 Feb 02, 2024

Thanks!!!

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New Here ,
Jun 22, 2024 Jun 22, 2024

it works finally, thank u ,,,...

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New Here ,
Aug 19, 2024 Aug 19, 2024

Thank you very much for your advice.

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New Here ,
Sep 27, 2024 Sep 27, 2024

The fact that I'm still getting updates on this thread TWO YEARS after it was first posted suggests that a) @markelrayes may have posted the single most useful Adobe community post ever, and B) reflects VERY poorly on Adobe that this is still even an issue!

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Explorer ,
Oct 21, 2022 Oct 21, 2022

This worked for me too!

 YOU ROCK! THANK YOU!

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Community Beginner ,
Oct 27, 2022 Oct 27, 2022

I've tried all of the solutions listed here. I'm running Windows 11, completely upto date system. I've worked out it's an Adobe Acrobat DC issue by removing Adobe Acrobat and letting the system fallback to Foxit phantom pdf which was my previous default software. The moment I did this, all of the pdf's can be previewed without a fuss. 

I'm at a complete loss of how to resolve this for now and don't want to waste more time than I already have. 

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Participant ,
Oct 28, 2022 Oct 28, 2022

Hi Josholo,

Adobe hasn't been very helpful in this thread. I'm not sure how to apply the Account Unknown fix in Windows 11. Maybe start a new discussion?

If I find any helpful tips or solutions I'll post them here for you.

 

As a quick fix, you can disable the preview pane in your folders, but as a designer, it's almost as frustrating as the errors.

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Community Beginner ,
Oct 31, 2022 Oct 31, 2022

Its a very frusting error, especially if you are doing any design and you have alot of files. The preview screen can really help with workflow and efficiency. 
For now, using the default system viewer without Adobe Acrobat DC installed is getting me out of trouble and working without a fuss. When i'm not buried in projects, I'll revisit this one and see if I can resolve. 

Strange that the preview works inside application like outlook but not in explorer. I unfortunatley don't have all of these 'unknown accounts' which has stumped as to the source of the error. 

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Participant ,
Dec 09, 2022 Dec 09, 2022

That is strange, are you sure you looked in the right folder?

It has happened that people have gone into the wrong folder, did you type out the file path or just click through? C:\Users\[username]\AppData\Local and then right-click on the Adobe folder?

Have you tried posting on a Microsoft forum?

I've attached the 5-step screenshots that I made in case you missed them.

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