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Anyone else had strange issues with MBSetup-278628F2.exe ?

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This update nearly trashed my Win10 (up to date 21H2) desktop , went into a restart loop that was difficult to stop. Did so eventually , but then MB would not start , so uninstalled , ran clean , tried a manual install , after a new D/L , same issue , looping restarts. Use the Recovery Tool to try a fix ,  no dice , then manually uninstalled MB , restarted to a stable system , ran sfc /scannow , fixed a few minor files , restarted , tried to install MB , got the msg "Mb will not install on this PC " . Given it was all fine prior to this update , and no significant process's were running at the time.

I did have a similar issue like this last year , on a diff PC , and needed support for a fix , seems the D/L for that Ver had a fault. I'm hoping that's not the case now.

I guess one of the issues I dislike is that MB does not popup signal when it's about to update , unless U have the console window up , would be very helpful if it flagged with a box requesting permission to do so , as U may be in a critical process that could well interfere with a smooth install process.

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Hello @freds and :welcome::

Although it may be best to move your topic to the Windows Malware Removal Help & Support subforum, a good start can be made here.

The official/highest integrity MBSetup.exe is like a small so-called setup stub and has not changed since the first week of this month. Even then, it likely was updated for enhancements, whereas last Wednesday's much larger mb4_offline installer is made available with each new official release of Malwarebytes for Windows.

So while you are waiting for an expert/staffer to reply, please download/run/reply with the results from the Malwarebytes Support Tool's grab for analysis:

  1. Download the Malwarebytes Support Tool.
  2. In your Downloads folder, open the mb-support-x.x.x.xxx.exe file.
  3. In the User Account Control pop-up window, click Yes to continue the installation.
  4. Run the MBST Support Tool.
  5. In the left navigation pane of the Malwarebytes Support Tool GUI, click Advanced.
  6. In the Advanced Options, click Gather Logs. A status diagram displays the tool is Getting logs from your machine.
  7. Soon a zip file named mbst-grab-results.zip will be saved to your desktop, please upload that file in your next reply here.

Thank you.

Edited by 1PW
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Thanks for your reply. I did run the tool at the time of the error , as soon as the system was stable. Strangely , it did not produce the required log file and nor did it clean the MB install , as a couple of files were left. I have just re d/l'd the tool and run it , it did not find an MB install ( I did uninstall manually) and did produce a log file.



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  • Root Admin

Please do the following so that we can get some logs to see what might be running on your computer to cause an issue.




Please do the following so that we can get started and see what's going on.

The Farbar Recovery Scan Tool is a free Windows utility designed to create troubleshooting logs for your computer. These logs help our Support team to identify and resolve issues with your computer.

There are two versions of the Farbar Recovery Scan Tool available for download: 32-bit and 64-bit.
To find which operating system is installed on your computer, refer to Microsoft's article: 32-bit and 64-bit Windows: Frequently asked questions

Download and launch Farbar Recovery Scan Tool

  1. Download the Farbar Recovery Scan Tool
    Do not click on any Ads.
  2. Locate the file you downloaded on your computer.
    Downloaded files are often saved to the Downloads folder.
  3. Double-click the downloaded file to run the Farbar Recovery Scan Tool.

  4. Windows protected your PC notification may appear. This notification is from the Windows Defender SmartScreen Filter which prevents unfamiliar apps from running on your PC.
    Disable smart screen ONLY if it interferes with software we may have to use:  What is SmartScreen and how can it help protect me?

         a.  Click More info.

         b.  Click Run anyway.

  5. When the User Account Control window appears, click Yes.


  6. To accept the Disclaimer of warranty, click Yes.


  7. Ensure only the boxes listed below are checked


    Registry  Services  Drivers
    Processes  Internet  One month



  8. Disable any Antivirus software you have installed ONLY if it stops software we may use from working.
    Please remember to re-enable any Antivirus software when we are finished running scans

    Click Scan. The scan may take a few minutes to complete.


  9. When the scan completes, Farbar Recovery Scan Tool shows two messages:

  • Scan completed. FRST.txt is saved in the same directory FRST is located.


  • Addition.txt is saved in the same directory FRST is located.


  • Click OK to close each message window


Please attach both of those logs on your next reply, DO NOT copy/paste the contents of the logs directly







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  • Root Admin

This computer has some services that are not loading and could use some general cleanup work.

Windows 10 is not without antivirus. It has Windows Defender antivirus built-in and it is on par with Avast antivirus.

I would recommend you uninstall Avast and then we'll look at uninstalling a couple other apps and do some clean up to correct these errors. Then when done if you want to install Malwarebytes we will, or if you don't want to then we'll just leave it at that and not install it.


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Yes , I'm aware of Win10's AV , it was active until I installed MB , and now it appears to not be able to be restarted. Avast was simply a backstop measure. Cleanup has completed and Win reports all is ok. I have reinstalled MB from the standalone pkg , and all appears well , will continue to monitor this desktop.

Thanks for your suggestions


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  • Root Admin

Okay, thanks for the update. If you don't enable Malwarebytes to register to the Security Center in Settings then Malwarebytes and Windows Defender should both run alongside each other with no issues.


Here are some information to help keep the computer clean.


Let's go ahead and do some clean-up work and remove the tools and logs we've run.

Please download KpRm by kernel-panik and save it to your desktop.

  • right-click kprm_(version).exe and select Run as Administrator.
  • Read and accept the disclaimer.
  • When the tool opens, ensure all boxes under Actions are checked.
  • Under Delete Quarantines select Delete Now, then click Run.
  • Once complete, click OK.
  • A log will open in Notepad titled kprm-(date).txt.
  • Please attach that file to your next reply. (not compulsory)


  1. Recommend using a Password Manager for all websites, etc. that require a password. Never use the same password on more than one site.
  2. Make sure you're backing up your files https://forums.malwarebytes.com/topic/136226-backup-software/
  3. Keep all software up to date - PatchMyPC - https://patchmypc.com/home-updater#download
  4. Keep your Operating System up to date and current at all times - https://support.microsoft.com/en-us/windows/windows-update-faq-8a903416-6f45-0718-f5c7-375e92dddeb2
  5. Further tips to help protect your computer data and improve your privacy: https://forums.malwarebytes.com/topic/258363-tips-to-help-protect-from-infection/ 
  6. Please consider installing the following Content Blockers for your Web browsers if you haven't done so already. This will help improve overall security

Malwarebytes Browser Guard

uBlock Origin


Further reading if you like to keep up on the malware threat scene: Malwarebytes Blog  https://blog.malwarebytes.com/

Hopefully, we've been able to assist you with correcting your system issues.

Thank you for using Malwarebytes


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Thanks for the suggestions. Yes , quite a few services on this PC are "off" a symptom of working for the "Lovely" people at Alphabet , where many services are required to be "off" if one is using Win10. I'm aware of some issues this causes , but was contractually obliged to make the changes , been too lazy to turn them back since retiring.

I do use robust passwords for most PC's that have I/Net access , generally use 12~16 Chrs , and as above , had to have robust rotating strategies.

This last event has highlighted some flaws , but as my wife and I are Flood refugees at the moment , & I do not have my "Normal" network access with all it's attendant security , I'm just "Winging" it for the next few months.

I do rely heavily on MB to provide the majority of my protection , and have done for years , but I have found a few issues with updates that seem to be a little MS like , and sometimes cause bigger issues than they are trying to fix. I usually don't take any update from MS until it's been out there for some time and been more rigorously tested , I'd been a "Beta" tester for years , got annoyed that some updates were plainly still at that stage, and released generally.

Thanks again , have a great day !

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  • Root Admin

Glad we could help.

If you need this topic reopened, please send a Private Message to any one of the moderating team members. Please include a link to this topic with your request.

This applies only to the originator of this thread. Other members who need assistance please start your own topic in a new thread.

Please review the following to help you better protect your computer and privacy Tips to help protect from infection

Thank you



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