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Malwarebytes 4 Win10 Hangs on startup - additional info

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Further to the extensive thread on this issue, I wanted to provide additional information which may help.

I can confirm that having upgraded my Windows o/s from Windows 10 v1803 to v1903 (May 2019), the issues with Malwarebytes 4 are no longer present.

To install the upgrade, I uninstalled Malwarebytes from my system and then agreed to the feature update for 1903. This took about 3 hours to install. Once the installation had completed, I then reinstalled Malwarebytes 4 and found it to be far more responsive.

If you are experiencing the same issue, then I hope this helps you. My original post on the topic can be found here:


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One bad-news update to this : During boot this morning, the system hung in the previously-described manner (the moment the desktop was revealed, all activity halted). I was forced to power-down and reboot. Upon rebooting, the problem didn't occur.

Now that I'm running a more recent version of Windows 10 (1903), I presume the debugging process to look into the issue will need to begin again. 

I did try to run the Malwarebytes Support Tool, but it fails at the zip logs stage with the error message "We were unable to create mbst-grab-results.zip, please notify Malwarebytes Support".

Instead, I've used FRST64 directly and generated the attached log files.

Hope to hear back from you soon.


FRST.txt Addition.txt

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Do you have fast startup enabled in Windows?  If so, I'd suggest disabling it and seeing if that resolves the issue as that feature has been known to cause issues with Malwarebytes and many other applications.  Instructions on doing so can be found here as well as here.

If that is the cause, that would also explain why the issue is so intermittent as fast startup is very unstable with regards to startup timing and the loading of processes and services on boot meaning that sometimes the system may start without any issues at all, while other times it may have problems all depending on the timing of Windows.

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