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Adobe Acrobat Reader DC slow with MBAM real-time protection


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Hi,

Having recently installed MBAM and enabled real-time protection, Adobe Acrobat Reader DC responds very slowly.  It takes several seconds to startup, to open a document or even to open its preferences. All this returns to normal if turn off Malware protection. The problem also goes away if I disable "enable protected mode at startup" in the enhanced security options in Acrobat Reader.

I have run the support tool clean option, but the problem remains.  Logs attached.

 

 

mbst-grab-results.zip mbst-clean-results.txt

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  • Staff

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3 hours ago, apwood said:

Logs attached above.

1- Please restaer the computer,

Quote

Pending File Rename Operations
==================================
C:\Users\Adrian Wood\AppData\Local\Temp\CoreSync.dll_TEMP                            
C:\Program Files\Malwarebytes  

2- Without Kaspersky installed does it do the same thing?

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10 minutes ago, apwood said:

Do I need to go ahead and uninstall to make certain?

I would try that, after it is removed, get a new set of logs also. I would also consider upgrading Windows as well. You are 2 versions behind.

Quote

Product Name:        Windows 10 Pro
Architecture:        x64
Current Build:       18363
Release ID:          1909

 

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23 minutes ago, apwood said:

Have installed the feature update, and  windows update suggests I'm up to date now except for  a .net update, a .net update and an adobe security update. I'll install all them and check again.  So far, however, it seems worse after the feature update.

When those are done grab anther log.

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It's just disabling the malware protection from the tray icon that fixes the problem. I don't have to disable anything else. Note that disabling protected mode at startup in the reader also fixes the problem even when malware protection remains on. I'm using the reader, not the full adobe writer.

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  • Root Admin

I just tested launching the program both with and without Malwarebytes running. Due to caching, it actually launches faster the second time even though Malwarebytes is now running.

 

First run: Malwarebytes not running

TotalMilliseconds : 74.7831

 

Second run: Malwarebytes is now running

TotalMilliseconds : 65.9872

 

How are you launching Acrobat Reader? Are you launching the program or are you double-clicking on a PDF file to launch it?

 

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I was opening a PDF from the recent items in the Adobe reader icon pinned to the taskbar.  However, if I simply open the reader it is still slow. Takes about 5 seconds.  Then if I click on Edit > Preferences it takes nearly 4 seconds for the Preferences dialog to open and fully draw itself. 

If I disable Malware Protection (the 2nd tick box from the top in your image above), then opening the reader takes about 2.5 seconds and opening its preferences takes about 2 seconds. If I disable all the tickboxes in your image above (or uninstall Malwarebytes) then it goes down to about 1.5 seconds and 1 second respectively.

The problem only happens Security (Enhanced) > Sandbox Protections has "Enabled Protected Mode at startup" enabled. If that is disabled then each of the above operations are almost instantaneous. Presumably its not a good idea to disable this though?

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  • Root Admin

So far I still cannot duplicate this issue. With setting in Adobe on or off and MB on or off my launch times are very low.

Now that I've run it multiple times my launch times are in just over 11 miliseconds

TotalMilliseconds : 11.4999

 

Can you open Malwarebytes and go to Settings->General then scroll down to Event log data and enable enhanced logging. Then restart the computer and try a few times launching Adobe Reader and then run our MBST tool again and post back new logs.

Thank you

 

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