99-100% Disk Usage, Windows Defender Service


  1. Posts : 22
    Windows 10 Pro x64 v2004 (OSb 19041.450)
       #1

    99-100% Disk Usage, Windows Defender Service


    Disk usage is intermittently 99-100% and Task Manager has pinpointed Windows Defender Service as the culprit. So, how should I deal with this? I'd rather not have to somehow disable it altogether (it won't even let me end the task) but I'm very concerned that this is going to prematurely kill my HDD, and I'd far rather deal with some malware than that. I prefer MBAM anyway...

    Once so far, this has been severe enough to entirely lock the system up. I'd rather it not happen again.

    Edit: This is not due to conflict between Win Defender and MBAM (not 'real-time').
      My Computer

  2. simrick's Avatar
    Posts : 16,108
    W10Prox64
       #2

    Mortiferon said:
    Disk usage is intermittently 99-100% and Task Manager has pinpointed Windows Defender Service as the culprit. So, how should I deal with this? I'd rather not have to somehow disable it altogether (it won't even let me end the task) but I'm very concerned that this is going to prematurely kill my HDD, and I'd far rather deal with some malware than that. I prefer MBAM anyway...

    Once so far, this has been severe enough to entirely lock the system up. I'd rather it not happen again.

    Edit: This is not due to conflict between Win Defender and MBAM (not 'real-time').
    Hi and welcome to Tenforums.

    MBAM is an anti-malware program, while Defender is an anti-virus. MBAM works alongside AVs in harmony on a system - even the Pro (paid) version which is always active (as opposed to the free/passive version).

    Personally, (and this is just my personal opinion), I would suspect that Defender is having difficulty with something lurking on your system.

    One thing to do, would be to download and install a 3rd-party AV (like Avast Free, or the 30-day trial of ESET NOD), which will auto-disable Defender as it takes over. Once it is installed and fully updated, I would run a complete scan, including scheduling a boot-time scan (which can be found in the settings in Avast.)

    If you have any problems installing Avast/ESET (or whatever program you choose), it could be a sign of something bigger.

    You could also run the System File Check to make sure everything is intact.
    SFC Command - Run in Windows 10 - Windows 10 Forums

    .
      My Computer


  3. Posts : 22
    Windows 10 Pro x64 v2004 (OSb 19041.450)
    Thread Starter
       #3

    This started straightaway after the forced upgrade to 10 from 7. System was squeaky clean and fully operational before. And everything I download, goes through my secondary system and MBAM before its moved to this one. It's clean.

    And I just ran across this. Hopefully unchecking 'run with highest priority' in the 'Windows Defender' tasks will do the trick.

    Curiously, the 'Mircosoft Antimalware' task is configured for 'Windows 7, Windows Server 2008'... and "The system cannot find the file specified (0x80070002)"...
      My Computer

  4. TairikuOkami's Avatar
    Posts : 4,652
    Windows Home Dev 21H1 x64
       #4

    This is a known issue since Vista, MS is working on solving it, sometimes ... .

    Try to add this to the exclusions: C:\Program Files\Windows Defender\MsMpEng.exe

    Windows Defender Exclusions - Add or Remove in Windows 10 - Windows 10 Forums

    Other than that, all I can advise is to use a real antivirus and not this thing. MS apps are generally basic.
      My Computer


  5. Posts : 22
    Windows 10 Pro x64 v2004 (OSb 19041.450)
    Thread Starter
       #5

    Ugh.... what I did, didn't do much. Still slammed for about 10 minutes after boot. However, so far, I haven't seen it do this at any other point like before (small consolation I suppose). But this is still very frustrating. I don't like it one bit. And I suppose M$ shall never address it. Guess I just have to hope it won't trash my HDD (don't plan on SSD for a good long while). Sucks.

    If anyone figures out the magic workaround please do sound off here... don't care how old the thread gets, I'd appreciate it.
      My Computer


 

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