Windows 10: Missing definitions in Defender Offline scan

Discus and support Missing definitions in Defender Offline scan in AntiVirus, Firewalls and System Security to solve the problem; Hi !Although no threats were found, The log of Defender Offline scan indicates the following missing definitions :WARNING 2021/06/06 08:52:55:641... Discussion in 'AntiVirus, Firewalls and System Security' started by Gratgrat, Jun 7, 2021.

  1. Gratgrat Win User

    Missing definitions in Defender Offline scan


    Hi !Although no threats were found, The log of Defender Offline scan indicates the following missing definitions :WARNING 2021/06/06 08:52:55:641 TID:1596 PID:1564 Missing definitions file in 'C:\mpam-fex64.exe' WARNING 2021/06/06 08:52:55:641 TID:1596 PID:1564 Missing definitions file in 'D:\mpam-fex64.exe' WARNING 2021/06/06 08:52:55:641 TID:1596 PID:1564 Missing definitions file in 'E:\mpam-fex64.exe' WARNING 2021/06/06 08:52:55:641 TID:1596 PID:1564 Missing definitions file in 'X:\mpam-fex64.exe' As far as I've seen on the net, it happened to other persons as well, some of them being ab

    :)
     
    Gratgrat, Jun 7, 2021
    #1
  2. Steve C Win User

    Defender Periodic Scanning or Offline Scanning?

    That link does suggest it's useful to use Defender offline scanning in addition to periodic scanning and a third party real time anti virus (e.g. Kaspersky).
     
    Steve C, Jun 7, 2021
    #2
  3. Jorge Tan Win User
    offline scan by win defender

    Hi,

    To further assist you with your concern with Windows Defender, follow the steps below:

    • Open the Run window by pressing Window + R button.
    • Then type services.msc and hit "Enter".
    • Look for Windows defender service in the list and right click on it and select start.
    • Once Windows defender is opened try to do the offline scan on that window.

    Let us know how it goes.
     
    Jorge Tan, Jun 7, 2021
    #3
  4. Missing definitions in Defender Offline scan

    Microsoft Defender Offline Scan

    Restored the Macrium Image and got my Recovery partitions back:


    Missing definitions in Defender Offline scan [​IMG]



    So as expected, I had a bunch of updates to do:


    Missing definitions in Defender Offline scan [​IMG]


    After the updates, I gave Microsoft Defender Offline a try and it worked!


    Missing definitions in Defender Offline scan [​IMG]



    Missing definitions in Defender Offline scan [​IMG]


    And this just shows that I'm back at the latest version build of 20H2:


    Missing definitions in Defender Offline scan [​IMG]


    This one was my fault and I admit I was the culprit of my own troubles. It was just a coincidence that I used Partition Wizard around the same time the Cumulative Updates were going on from Oct 28th to November 11th and it gave me the suspicion to suspect them being responsible for the Offline scan problem.

    I mean who the heck would of ever thought that a Recovery Partition would have anything to do with an Offline Scan in an Online world?

    A special thanks to OldNavyGuy for his suggestion that a Windows Recovery Partition being deleted was the problem.
     
    EyeInTheSky, Jun 7, 2021
    #4
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Missing definitions in Defender Offline scan

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