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37 minutes ago, mo35 said:

Have web protection disabled for couple days as suggested in workaround , no more crashes observed.

Have you tried enabling Beta updates in MB? If after you install the beta you still have issues, We need a couple of things from you.

We need to get information from this machine in order to have the proper detail to help you forward.
 NOTE: The tools and the information obtained is safe and not harmful to your privacy or your computer, please allow the programs to run if blocked by your system.

    Download Malwarebytes Support Tool
    
    
    Once the file is downloaded, open your Downloads folder/location of the downloaded file
    Double-click mb-support xxx.xx.exe to run the report
        You may be prompted by User Account Control (UAC) to allow changes to be made to your computer. Click Yes to consent.
        
    Place a checkmark next to Accept License Agreement and click Next
    You will be presented with a page stating, "Get Started!"

    Do NOT use the button “Start repair” !
    Click the Advanced tab on the left column
    
    Click the Gather Logs button
    
    A progress bar will appear and the program will proceed with getting logs from your computer
   
    Upon completion, click a file named mbst-grab-results.zip will be saved to your Desktop. Click OK
    Please attach the ZIP file in your next reply.

 

Also,

Can you please send us the following file: C:\Windows\MEMORY.DMP 

Use a service like www.wetransfer.com to send us the memory dump.

Thank you.

 

 

 

Beta Updates.png

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Hi all,

If you are still encountering an issue, please ensure you have the latest beta component package version installed: https://forums.malwarebytes.com/topic/252170-a-new-malwarebytes-4-beta-is-now-available/

If the issue persists with version 1.0.801, please gather additional troubleshooting data.

  • Enable event log data in Malwarebytes (Settings -> General -> Event log data).
  • Reproduce the BSOD.
  • Compress and upload the generated C:\Windows\MEMORY.dmp dump file. Provide a download link.
  • Gather logs with the Malwarebytes Support Tool and provide the generated file: https://support.malwarebytes.com/docs/DOC-2396
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I just had another system crash. Details of my Malwarebytes installation are:

Malwarebytes version:        4.0.4.49
Update package version:        1.0.18026
Component package version:    1.0.801

I've attached a copy of mbst-grab-results.zip

Unfortunately, I do not appear to have file called MEMORY.DMP in my C:\Windows folder.

 

mbst-grab-results.zip

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Thanks for the logs. The System event log shows dump file creation (with no specific details on why).

We're still investigating this issue and hope to have further information available shortly. In the meantime, leaving Web Protection disabled or reverting to an earlier version are the best options to workaround the issue (see here).

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On 1/14/2020 at 4:39 PM, Chris_in_Makati said:

Good luck in your search for a "flawless" software product. Let us know if you ever find that unicorn.

 

One week later and you still fighting? 
Let me tell you that since 2009 year ( kaspersky bsod, was nvidia driver related) I'm not seen bsods or any other crashes utnil end of 2019 year, when installed the new mbam version. But I use only EEK portbale for regular scans and WD. So...many apps are flawless. For me is not normal to see apps related bsods. But keep fighting. Good luck :D

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''So...many apps are flawless'' 
I mean not only antivirus/malware protection apps. Last 10 years I used and tried more than 100 + different kind of apps and 99% of them work flawlessly. For me is not normal any kind of apps to cause bsod/crash or any other anomalies.
Simple solution - uninstall MBAM. Or keep being a beta tester.

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I'm glad I found this thread. I've been using Pro for years. I was getting blue screen crashes every 20 minutes or so. Windows let me know it was caused by MWAC.SYS. I got so frustrated I uninstalled Malwarebytes and went to Bitdefender. I have many clients using MB per my recommendation. Thank goodness I don't have them on auto-update. Try to do better going forward. When I see some feedback in this thread that the fix is working I'll update my clients, but I'll probably stay with Bitdefender on my own machine because I have to be able to rely on my anti-virus real-time/ransomware solution.

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3 minutes ago, MikeT1948 said:

None of the links I have tried to get the latest beta release provide downloads that work. All crash about 1/3 of way through install. Can anyone provide a good link?

You can not "download" it outside of the MB program.

 

Beta Updates.png

MB Manual Update.png

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My Premium user interface does not show these screens and options. I uninstalled MB completely and now am using the last working version (non-beta) number 3.8.3.2965-1.0.629-1.0.13137 . I've looked all over in that version and I see no ability to accept Beta versions. Like I said is there a link?

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Just now, MikeT1948 said:

Like I said is there a link?

There is no links as it is still a BETA. You need to have version 4 installed to enable beta updates in the interface (first screen shot) and then do a manual check for updates (second screenshot)

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  • 2 weeks later...

Good afternoon all. I too have been experiencing BSOD on all three of my Windows 10 machines using Malwarebytes Pro since around 1/13/2020.

As others have said, WhoCrashed Pro showed MalwareBytes as the culprit:

On Mon 2/3/2020 1:22:16 PM your computer crashed or a problem was reported
crash dump file: C:\WINDOWS\Minidump\020320-13312-01.dmp
uptime: 04:26:25
This was probably caused by the following module: mwac.sys (mwac+0x11E9F)
Bugcheck code: 0x3B (0xC0000005, 0xFFFFF80262A9EF47, 0xFFFF8006FF579310, 0x0)
Error: SYSTEM_SERVICE_EXCEPTION
file path: C:\WINDOWS\system32\drivers\mwac.sys
product: Malwarebytes Web Protection
company: Malwarebytes
description: Malwarebytes Web Protection
Bug check description: This indicates that an exception happened while executing a routine that transitions from non-privileged code to privileged code.
This appears to be a typical software driver bug and is not likely to be caused by a hardware problem.
A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: mwac.sys (Malwarebytes Web Protection, Malwarebytes).
Google query: mwac.sys Malwarebytes SYSTEM_SERVICE_EXCEPTION

 

I had disabled MalwareBytes until I found this thread. I am glad I found this thread and that MWB is aware of the issue.

After seeing this thread, I have re-enabled MalwareBytes and enabled 'Beta Updates'. I am currently on:

Version: 4.0.4.49

Update package version: 1.0.18712

Component Package Version: 1.0.810

 

I assume that is the latest version / beta version as of this posting. I will continue to monitor the behavior on all three of my computers to see if MWB still causes BSOD.

Thank you for everyone's feedback and input here.

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1 minute ago, MikeT1948 said:

Even though I just renewed and had the better part of a year remaining, I gave up and went to an alternative.

Sorry that you did give the fixed version a chance. Best wishes.

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