Windows 10: Windows Defender Default Behavior Solved

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  1.    08 Feb 2017 #11

    Thanks. I wonder if by scheduling a daily scan, does it still do the random scans as well. Not that it matters, just really curious about how they built this program.
      My ComputerSystem Spec


  2. Posts : 2,554
    Windows 10 x64 Home Build (Redstone(1)) 15063.608
       08 Feb 2017 #12

    reelme said: View Post
    Thanks. I wonder if by scheduling a daily scan, does it still do the random scans as well. Not that it matters, just really curious about how they built this program.
    Hi yes I have sometimes found that it has done a random scan, normally for me 2 or 3 times a month
    Usually after an update has taken place
      My ComputerSystem Spec

  3.    09 Feb 2017 #13

    OK, so original poster back here - I have been watching to see what happens and Defender says real time protection is on. But it says that the last scan was yesterday morning, which is about 36 hours ago. I thought from the answers here that Defender would scan at opportune times throughout the day. I see no evidence of this. So, again I ask, without actually scheduling scans myself, is Defender doing scans on the go? Where can I see a log or evidence this is occurring?
      My ComputerSystem Spec

  4.    09 Feb 2017 #14

    Applications and Services Logs > Microsoft > Windows > Windows Defender > Operational:
      My ComputerSystem Spec

  5.    09 Feb 2017 #15

    Looked in there and saw only the event from 2 days ago. After reading hundreds of posts, it seems that this a quite common that the auto scan doesn't work. I think I will just go back to Mcafee or something else.
      My ComputerSystem Spec


  6. Posts : 357
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
       09 Feb 2017 #16

    In Task Scheduler navigate to
    Task Scheduler Library > Microsoft > Windows > Windows Defender
    You should see the built in WD Scan task

    In Task Scheduler, Enable All Tasks History

    After All Tasks History is enabled, you can look at the History tab of any task to see a log
    You may need to wait hours/day to see the WD scan log info you want
      My ComputerSystem Spec

  7.    09 Feb 2017 #17

    I enabled all tasks history like you said. In the top window, it DID show a scan yesterday that I was not aware of. In the other window under history, there is nothing. Are you saying that this history could take a while to populate?
      My ComputerSystem Spec


  8. Posts : 3,726
    10 Home x64 (1703) (10 Pro on 2nd pc)
       09 Feb 2017 #18

    reelme said: View Post
    OK, so original poster back here - I have been watching to see what happens and Defender says real time protection is on. But it says that the last scan was yesterday morning, which is about 36 hours ago. I thought from the answers here that Defender would scan at opportune times throughout the day...
    Yes, but Defender's definition of an 'opportune time' is when NO other activity is taking place. The automatic Defender scan is set to abort on any activity - even a mouse click can count as 'activity'. For the reassurance of a regular daily scan, set a scheduled task in addition to the automatic one - either that or leave the system running but unused for a while.
      My ComputersSystem Spec


  9. Posts : 357
    Multi-Boot W7_Pro_x64 W8.1_Pro_x64 W10_Pro_x64
       09 Feb 2017 #19

    reelme said: View Post
    I enabled all tasks history like you said. In the top window, it DID show a scan yesterday that I was not aware of. In the other window under history, there is nothing. Are you saying that this history could take a while to populate?
    No, i just meant you might have to wait a while before the task auto runs again, as soon as it runs the info should be in the History tab

    I don't know what the other window under history logs and shows.

    I didn't like the way the WD built in scan worked so i got rid of that task, i can't really test it unless i get that task back
      My ComputerSystem Spec

  10.    09 Feb 2017 #20

    So David, in that top window where it showed a scan ran yesterday - that doesn't correlate with the "scan details" note at the bottom of the Defender App page. Does the note on the Defender page just pertain to a manual scan maybe???
      My ComputerSystem Spec


 
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