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Latest MBAM Appears To Kill Local Network Sharing / Visibility


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It seems an update to MBAM (sometime in the last week or two) has effectively disabled both Network Discovery and File and Printer Sharing in Windows 10.  That is, even with those features enabled they are non-functional.

I have two nearly identical PCs (both running Windows 10 Pro and both running Malwarebytes) on a home network that is shared with a NAS and various other devices.  After years of trouble-free networking I discovered that when I open File Explorer on either machine I was suddenly unable to see any other devices on the network.  After hours of failed troubleshooting I finally called Microsoft Tech Support and allowed them to connect to one of my PCs remotely.  After a very frustrating hour they asked if I would disable my antivirus software so they could perform further testing. Within seconds of turning off Malwarebytes all my missing devices became visible in File Explorer!  My other PCs, the NAS, the home theater - everything.  And when I re-opened MBAM they all disappeared again.

Unfortunately, I can find no option in the Malwarebytes setup to account for this nor could I find any documentation here or elsewhere to explain what's happening which begs the question:  Is this a bug?

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***This is an automated reply***

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1 minute ago, Malwarebytes said:

***This is an automated reply***

Hi,

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:

  Reveal hidden contents
  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.

Screenshots:

  Reveal hidden contents
 
 
 
 

 

Spoiler

 

 

 

01.png

02.png

03.png

04.png

05.png

06.png

 

 

 

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

  Reveal hidden contents

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

That's more than a bit vague.  What is the "Malwarebytes Support Tool" and where does one find it?

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  • Root Admin

Hello @Crady

Sorry to hear you're having issues with the program.
The forum does not allow editing until your post count has increased in an effort to reduce and prevent spammers.

 

 

 

Please try the following beta update which should resolve this loss of visibility for network neighborhood and printer issues.

 

NOTE: Please close all open applications before running this update installer. It is a mandatory reboot of the computer. Unsaved documents will be lost.

 

 

If  the update does not restart the computer then manually restart the computer

 

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1 minute ago, AdvancedSetup said:

Hello @Crady

Sorry to hear you're having issues with the program.
The forum does not allow editing until your post count has increased in an effort to reduce and prevent spammers.

 

 

 

Please try the following beta update which should resolve this loss of visibility for network neighborhood and printer issues.

 

NOTE: Please close all open applications before running this update installer. It is a mandatory reboot of the computer. Unsaved documents will be lost.

 

 

If  the update does not restart the computer then manually restart the computer

 

Nope.  I just now installed the latest updates and my issue remains unresolved.

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7 minutes ago, Crady said:

Nope.  I just now installed the latest updates and my issue remains unresolved.

Did you restart the computer?

Please try running the Network Troubleshooter and let us know if that resolves it

 

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Hello, I can also confirm that Malwarebytes update 4.2.2.95, component version 10.0.1096 does fix network browsing in recent versions of Windows 10! I've been tearing my hair out for the last few days trying to get network neighborhood to work on my LAN computers. I should have suspected that Malwarebytes was the culprit as it had also broken IPv6 pings for the last few months - until they fixed that recently. However, I failed to make the association until reading about this update.

For anybody who is running a recent version of Windows 10 who's network neighborhood is still not working after installing the above-mentioned Malwarebytes update, please read up on WS-Discovery and how to make it work on your network. Since Microsoft has for the most part disabled SMB version 1 for security reasons, WS-Discovery needs be enabled. To do this, you need to make sure certain Windows services are enabled and automatically started at boot up. There is lots of info about this on the Web. Also, note some third party devices, like NAS devices or printers, may still rely on SMB1. They'll need updating from the manufacturer in order to show up in Windows network neighborhood.

Hope this helps.

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On 10/27/2020 at 3:46 AM, Crady said:

It seems an update to MBAM (sometime in the last week or two) has effectively disabled both Network Discovery and File and Printer Sharing in Windows 10.  That is, even with those features enabled they are non-functional.

I have two nearly identical PCs (both running Windows 10 Pro and both running Malwarebytes) on a home network that is shared with a NAS and various other devices.  After years of trouble-free networking I discovered that when I open File Explorer on either machine I was suddenly unable to see any other devices on the network.  After hours of failed troubleshooting I finally called Microsoft Tech Support and allowed them to connect to one of my PCs remotely.  After a very frustrating hour they asked if I would disable my antivirus software so they could perform further testing. Within seconds of turning off Malwarebytes all my missing devices became visible in File Explorer!  My other PCs, the NAS, the home theater - everything.  And when I re-opened MBAM they all disappeared again.

Unfortunately, I can find no option in the Malwarebytes setup to account for this nor could I find any documentation here or elsewhere to explain what's happening which begs the question:  Is this a bug?

same problem, 
i was turning off Malwarebytes all my missing devices became visible in File Explorer 

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16 minutes ago, goezz said:

same problem, 
i was turning off Malwarebytes all my missing devices became visible in File Explorer 

Have you updated yet?

 

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Just now, goezz said:

 

 

thank you I manually update, on the MB auto update settings ... now the network is working as well ..

Thanks for the status update.

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Both issues should be fixed in the latest release, including the issue with network printers, NAS storage, and Network Neighborhood issues.

To install the new version, open Malwarebytes and access settings by clicking the small gear icon in the upper right, then click the Check for updates button under the General sub-tab and allow it to download and install the new version, then restart your system once it completes (even if you aren't prompted to do so) in order to ensure that all the new modules are loaded fresh into memory.

Once that is done, test to verify that the issue is now resolved and let us know if you still continue to see the problem.

Thanks

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  • 2 weeks later...
  • Root Admin

Beta version 4.2.3.96 component package 1.0.1112 released today

 

This includes the fix for the remaining users that were still having Printer and Network discovery issues. Please enable Beta and check for program updates.

After the update, I would recommend restarting the computer even if not asked.

 

 

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I have version 4.2.3.96 - it is still preventing network access and have found it is also blocking Excel files. I've turned off web protection to allow network discovery to work and can now see my 2 NAS (1 x Qnap, 1 x WD). I've also had to turn off exploit protection for MS Excel, even though the file I'm opening as a test has no macros whatsoever.

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  • Root Admin

Hello @dratsab

Please follow the directions from the following topic to do a clean removal and reinstall of Malwarebytes

Uninstall and reinstall Malwarebytes using the Malwarebytes Support Tool

Once that has been completed please restart the computer again and get me the following logs from the computer.

Upload Malwarebytes Support Tool logs offline

Thank you

 

Edited by AdvancedSetup
updated information
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No need - I realised after posting (my apologies) that I wasn't running the beta version. I am now. I have web protection and exploit protection turned back on and everything is running perfectly. Thanks for the reply.

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1 minute ago, dratsab said:

No need - I realised after posting (my apologies) that I wasn't running the beta version. I am now. I have web protection and exploit protection turned back on and everything is running perfectly. Thanks for the reply.

Excellent, glad to hear and thank you for the follow up reply.

Take care

 

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