Hi Jan,

From the logs it looks like the issue is intermittent in your machine. Please confirm it that’s the case.

Meanwhile can you apply the below registry and confirm if that fixes the issue?

o Path: HKLM\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown
o DWORD Key: bDisallowDLLUnload
o Value: 1

Hi,
We need some additional info regarding the issue you are facing while viewing PDF in IE.

1. Are you facing the issue after updating to the recent version – 2019.012.20034
2. You are facing the issue only while Protected Mode is disabled. Can you confirm the status of “Internet explorer Enhanced protected mode”? Open IE > Internet Options > Advanced > Security. Check the status of “Enable enhanced protected mode” and “Enable 64-bit process for enhanced protected mode”. Please share with us screenshots.

3. We will need the browser plugin logs. Steps are mentioned below:-

Get browserloggingadd.reg and browserloggingremove.reg from here – https://files.acrobat.com/a/preview/07fe4737-1ff6-4210-93b6-f715c9e8ff23

1. Run browserloggingadd.reg file which will add registries. (Select Yes if dialog shows up)
2. Download debugview.exe from https://technet.microsoft.com/en-us/library/bb896647.aspx
3. Run DebugView, keep it opened.
4. Go to DebugView→ Options→ Check “Clock Time” and “Show milliseconds”.
5. Clear Debug View logs using “Edit→Clear Display” or CTRL+X
6. Open PDF in IE using current workflow till you gets the error/hang. Please note the time(PC time) you get error/hang/crash and mention it while providing logs.
7. Exit IE/Web app.
8. Save logs in DebugView. (Use save as, because DebugView sometimes overwrites the logs)
9. Exit DebugView.
10. Send the logs.
11. Run browserloggingremove.reg to remove registry entries.
Please take these logs and share it with us. Zip might not be allowed so please share logs using a link.