Windows Defender not running scans

  1. Posts : 87
    Windows 10

    Windows Defender not running scans

    I wonder if anyone can identify why Windows Defender has suddenly, i.e. the last day or two, stopped running scans on my home PC?

    The product is up to date:

    Windows Defender not running scans-1.jpg

    If I attempt to scan a folder of file, the screen above appears and sometimes the scan will run, but more often no scan is performed and the screen below is displayed:

    Windows Defender not running scans-2.jpg

    There seems to be no pattern to this erratic behaviour.

    I use MalwareBytes and CCleaner in real-time mode so I wonder if they might be affecting Windows Defender at all. However, if both are switched off the same problem occurs.

    I have Windows 10 build OS 17763.18.
      My Computer

  2. Caledon Ken's Avatar
    Posts : 24,170
    Windows 10 Pro x64 Version 2004

    Hi Mr Morgan.

    Disabling is a start but I would uninstall Malwarebytes and test for a while.

    Your OS appears to be a little out of date, are you delaying updates in any manner? Would expect to see .134(November) or .168(December)

      My Computer

  3. Posts : 87
    Windows 10
    Thread Starter

    Thanks for your response Ken.

    I updated my version of Windows 10 a few hours after my original post. It is now version 17763.168.

    Windows Defender appears to be behaving more normally but I will be keeping an eye on it.

    I do wonder if some of the more recent Windows updates may have had some side effects of the nature I described?
      My Computer

  4. Caledon Ken's Avatar
    Posts : 24,170
    Windows 10 Pro x64 Version 2004

    Anything is possible and Malwarebytes has been updating along with everything else.

    The sands under our feet are shifting so fast.

    Hope it is fixed.
      My Computer


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