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Memory drain and CPU pegged at 100%

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Have MBAM premium 3.0.6. Component 1.0.75.  Since it updated itself on on 3/27, every time I start the computer or awaken it from sleep, it uses large blocks of memory and pegs the CPU at 100%. When it eventually finishes the scan, I get the CPU back, but not always the memory. The computer is useless during the scans, and even now, with the background scan completed.  Right now memory use id 813,000K, even though CPU usage of MB is 0.  This problem happens repeatedly. Has never happened prior to recent update.

I've read enough on the forums that this has been an ongoing problem, and since I've relied on MBAM, I don't want to delete it and stop using it. How can I stop it from taking over my laptop?



MBAM3 memory hog.doc



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@Marty99 There is a newer version of MB .

Let's try this first....

  1. Please follow the steps in this pinned topic to uninstall your current version of MBAM and reinstall the latest build - Malwarebytes mb-clean tool (after uninstalling you can download the latest version to re-install from HERE)
  2. If that does not correct the issue, then please read the following and attach to your next reply the 4 requested logs - Diagnostic Logs (the 4 logs are: mbam logs zipped, FRST.txt, Addition.txt and mb-checkResult.txt)

Exclude these in your Anti-virus exclusion settings and IF you are using any Firewall other the built in one be sure to allow Malwarebytes  complete access.



C:\Program Files\Malwarebytes\Anti-Malware\MbamPt.exe
C:\Program Files\Malwarebytes\Anti-Malware\mbam.exe
C:\Program Files\Malwarebytes\Anti-Malware\assistant.exe
C:\Program Files\Malwarebytes\Anti-Malware\MBAMWsc.exe
C:\Program Files\Malwarebytes\Anti-Malware\mbamtray.exe
C:\Program Files\Malwarebytes\Anti-Malware\MBAMService.exe



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Thanks for your quick reply. As I posted my note, I saw the newer version, uninstalled the version with component 1.0.75, and reinstalled. 1.0.96. I hadn't run the clean tool.  At this point, and after restart, MBAM is running and MBAM service is running at 296,000 K.  I have Norton Security on this laptop too and it wouldn't let me run FRST, which is why I didn't post the logs from the outset.  I guess I'll watch what happens, but even 296,000K is too much memory in use. Do you agree?  And, what should be expected in terms of memory use? 

MBAM3 memory hog update.doc

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18 minutes ago, Marty99 said:

but even 296,000K is too much memory in use. Do you agree? 

That is average, it can increase and decrease depending on what protected apps you have open.


18 minutes ago, Marty99 said:

I have Norton Security on this laptop too

Did you add the exclusions?


18 minutes ago, Marty99 said:

wouldn't let me run FRST

.Frst is safe you can allow it.  We would never ask you to run an unsafe tool.

Edited by Porthos
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  • 1 month later...

I've used/loved MWB for 6-8 years, but after updates, 3.0 started running 100% CPU at some point (as I Ioaded multiple pages with Firefox) and slowing down everything when I'm on line - stopping the exploit and ransom functions didn't help (nor did briefly disabling all functions).  System is old Dell D630, 2.4GHz, 4GB, win7, 64-bit, with latest MWB updates.   My only AV is MSE, which I disabled during the following process.

After reading much (and being somewhat lazy/cautious with software mods), I went for the most basic/simple fix and it seems to have worked.   I've never done a clean MWB install so did this with "mb-clean-".  After a few minutes, it called for a reboot (I saw no dialogue box saying the uninstall was working), after which it asked if I wished to download/install the latest MWB, which I did... one click download/install and it asked me if I wished to scan, which I did and it updated and finished in a few minutes.  

Bonuses... MWB FINALLY made it easy to delete the MWB desktop shortcut... instead of having to disable "self protection" first.  This cleaning process also saved my registration code so I didn't have to sort through emails and find it again (though I did) - some instructions say it will be deleted so must either find it in registry or BE SURE you have the activation email.  

THANK YOU Malwarebytes for a great product.

Edited by Chris5555a12df16352
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