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High (near100%) disk useage on startup

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Windows 10 --- startup is slowed considerable by "Malwarebytes Services".  Disk usage shows as near 100% and startup is stalled until Malwarebytes activity drops.  Disk has plenty of room and utilities say it's healthy.  Any ideas for what's going on?

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Hello and Welcome

Let's try this first.... (It is recommended that you de-activate your Malwarebytes first before un-installing or using the clean removal tool - the tool can only backup the license info for MB3 so if you have MBAM v1 or v2 you have to de-activate it manually)

  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 (NOTE: After uninstalling with the mb-claen tool you will be asked to reboot.  Once you reboot it will ask you if you want to re-install Malwarebytes, you can select YES or you can download the latest version (currently v3.0.6 CU4.1) 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)
  3. NOTE: More info about the latest Malwarebytes 3.0.6 CU4.1 HERE; MB 3 User Guide ONLINE; MB 3 User Guide PDF; MB 3 FAQ: Malwarebytes 3.0 - Frequently Asked Questions

Also do you have a screen shot where it shows what Malwarebytes service is using up 100%

Please let us know how it goes.

Thank You,


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This is most likely from a scheduled scan that was missed, and is running when your computer first starts up. You can disable this under Malwarebytes -> Settings -> Scan Schedule.

Open  the scheduled scan, open the advanced options and uncheck the "Recover missed tasks" box. We are working on a better implementation for this in the future

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