Jump to content

Adobe Acrobat Reader DC slow with MBAM real-time protection

Recommended Posts


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

Link to post
Share on other sites

  • Staff

***This is an automated reply***


Thanks for posting in the Malwarebytes for Windows Help forum.

If you are having technical issues with our Windows product, please do the following:

Malwarebytes Support Tool - Advanced Options

This feature is designed for the following reasons:

  • For use when you are on the forums and need to provide logs for assistance
  • For use when you don't need or want to create a ticket with Malwarebytes
  • For use when you want to perform local troubleshooting on your own

How to use the Advanced Options:

  1. Download Malwarebytes Support Tool
  2. Double-click mb-support-X.X.X.XXXX.exe to run the program
    • You may be prompted by User Account Control (UAC) to allow changes to be made to your computer. Click Yes to consent.
  3. Place a checkmark next to Accept License Agreement and click Next
  4. Navigate to the Advanced tab
  5. The Advanced menu page contains four categories:
    • Gather Logs: Collects troubleshooting information from the computer. As part of this process, Farbar Recovery Scan Tool (FRST) is run to perform a complete diagnosis. The information is saved to a file on the Desktop named mbst-grab-results.zip and can be added as an email attachment or uploaded to a forum post to assist with troubleshooting the issue at hand.
    • Clean: Performs an automated uninstallation of all Malwarebytes products installed to the computer and prompts to install the latest version of Malwarebytes for Windows afterwards. The Premium license key is backed up and reinstated. All user configurations and other data are removed. This process requires a reboot.
    •  Repair System: Includes various system-related repairs in case a Windows service is not functioning correctly that Malwarebytes for Windows is dependent on. It is not recommended to use any Repair System options unless instructed by a Malwarebytes Support agent.
    • Anonymously help the community by providing usage and threat statistics: Unchecking this option will prevent Malwarebytes Support Tool from sending anonymous telemetry data on usage of the program.
  6. To provide logs for review click the Gather Logs button
  7. Upon completion, click OK
  8. A file named mbst-grab-results.zip will be saved to your Desktop
  9. Please attach the file in your next reply.
  10. To uninstall all Malwarebytes Products, click the Clean button.
  11. Click the Yes button to proceed. 
  12. Save all your work and click OK when you are ready to reboot.
  13. After the reboot, you will have the option to re-install the latest version of Malwarebytes for Windows.
  14. Select Yes to install Malwarebytes.
  15. Malwarebytes for Windows will open once the installation completes successfully.













If you are having licensing issues, please do the following: 


For any of these issues:

  • Renewals
  • Refunds (including double billing)
  • Cancellations
  • Update Billing Info
  • Multiple Transactions
  • Consumer Purchases
  • Transaction Receipt

Please contact our support team at https://support.malwarebytes.com/hc/en-us/requests/new to get help

If you need help looking up your license details, please head here: Find my premium license key



Thanks in advance for your patience.

-The Malwarebytes Forum Team

Link to post
Share on other sites

3 hours ago, apwood said:

Logs attached above.

1- Please restaer the computer,


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?

Link to post
Share on other sites

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.


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


Link to post
Share on other sites

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.

Link to post
Share on other sites

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.

Link to post
Share on other sites

  • 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?


Link to post
Share on other sites

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?

Link to post
Share on other sites

  • 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


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
Back to top
  • Create New...

Important Information

This site uses cookies - We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.