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malwarebytes crashes when definition update is attempted

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malwarebytes crashes when update is attempted.  


Error message is as follows.


Runtime error! 

Program: C:\Program Files (x86)\Malwarebytes Anti-Malware\mbam.exe

This application has requested the Runtime to terminate it in an unusual way.

Please contact the application's support team for more information.

Tried in safe mode, same result.  uninstalled and reinstalled, same result. repeated again using mbam-clean- and then clean reinstall after reboot as directed on your site.  same outcome.


checked for rootkits using TDSSkiller - none found
ran ccleaner, removed all items found, continued scanning until results were clean.  still generating error after repeated clean un/reinstall using above mbam cleaner utility


Would like to manually update definitions and run a scan if possible.


logging tools have been downloaded and are waiting usage instructions.  


Thank you

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Hello BlackBeard:


If the Farbar Recovery Scan Tool (FRST.exe) was run from your desktop, it is quite likely that a Addition.txt file was also placed on the computer's desktop.


Please attach that critical file in a reply to this topic.


Thank you. :)

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Hello Blackbeard,


Would you tell us which version is now installed at this very point in time?   1,75 ?  or are we in limbo ( due to the failed install).


You do know, that the log from the 1.75 run does show a number of PUPs --- undesirable -- potentiall unwanted programs were found & detected and listed --- however, you appear to have overlooked to mark & select all of them for removal.


We need to get in sync and map out a plan ( which I will help you with) and you will need to follow guidance.


Start the Anti-Malware ( if possible) and tell me which version is there now.


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actually I did select and remove all of them using 1.75 then I removed 1.75 and put 2 on instead.  it installed successfully as I stated earlier. I have done nothing other than use your product that was not directed by you or the previous responder to my post.  Please proceed with instruction, however realize that we have a time limit.  This computer needs to be up and running by this afternoon.

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First, ( but only if the program is running) lets shutdown the realtime Malwarebytes Anti-Malware. Go to the desktop Taskbar. See the blue-color MBAM icon in the notification area.
Do a Right-click on it with your mouse, and select EXIT.

I have attached a zip file which you need to Save to your system.

Once saved, unzip it to extract all contents.   which will be 2 files.
Next, double-click on **net_replacement.bat** file.
It should run fairly quickly in a command-prompt window.

Once that is done, restart the Anti-Malware and let me know if it works normally.


You may need to do a Windows Logoff >> Shutdown >> Restart.

Then have patience and let Windows load normally and then later check on the Anti-Malware.


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I had the exact same issue, this fix resolved the problem for me as well.

- uninstalled version 1.? (i didnt note which version of 1 I had, I think it was 1.60?)

- rebooted

- ran malwarebytes cleaner 2x that I just downloaded.

- rebooted

- installed, malwarebytes auto launches after install and starts to update and instant error -

"This application has requested the Runtime to terminate it in an unusual way.

Please contact the application's support team for more information."


Maurice, can you please let me know:

- what is the difference between your net.conf file and the original net.conf file?

- what does your net.conf file do to resolve this issue?

- will your net.conf file be included in next version of 2.0.2?



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Some systems with this "update" fail issue that won't go away, just need to have that 1 configuration file to get over the issue.

It's only usually 1 one-time / one-off type of occurrence.

And it does not mean that the program version is at fault.

It is just a confluence of circumstance that leads to the issue.

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