Windows 10: scheduling Windows Defender full scan: problems and questions

Discus and support scheduling Windows Defender full scan: problems and questions in AntiVirus, Firewalls and System Security to solve the problem; I have a new Windows 10 Pro 64 bit laptop that I am configuring. I am coming from a Windows 7 desktop. Much has changed. For its malware defense, I... Discussion in 'AntiVirus, Firewalls and System Security' started by up2trix, May 4, 2019.

  1. up2trix Win User

    scheduling Windows Defender full scan: problems and questions


    I have a new Windows 10 Pro 64 bit laptop that I am configuring. I am coming from a Windows 7 desktop. Much has changed.


    For its malware defense, I am using Windows Defender and Malwarebytes Premium.


    Scheduling Malwarebytes to scan at a certain time of day is trivial, but I have found it difficult to schedule Windows Defender to do a full scan.


    ~~~~~~~~~~

    I first tried to schedule Windows Defender using Schedule tasks as described here.


    That worked, except that I see no option to specify a full scan, so surely it is doing the default of a quick scan.

    Story to be continued below...


    ~~~~~~~~~~


    I next stumbled across other links that said that you can control many (all?) aspects of Windows Defender scans via Group Policy.


    The 3 best links being this, and this, and this.

    So, I opened Group Policy Management Editor and made these changes from the defaults:


    Code: Group Policy Management Editor > Local Computer Policy > Computer Configuration > Administrative Templates > Windows Components > Windows Defender Antivirus Randomize scheduled task times: Disabled Scan Allow users to pause scan: Enabled (could have left unconfigured, but wanted to be explicit) Check for the latest virus and spyware definitions before running a scheduled scan: Enabled Scan archive files: Enabled (could have left unconfigured, but wanted to be explicit) Scan packed executables: Enabled (could have left unconfigured, but wanted to be explicit) Scan removable drives: Enabled Specify the day of the week to run a scheduled scan: Enabled with Options: Every Day Specify the maximum percentage of CPU utilization during a scan: Enabled with Options: 90 Specify the scan type to use for a scheduled scan: Enabled with Options: Full system scan Specify the time of day to run a scheduled scan: Enabled with Options: 330 (330 minutes = 5.5 hours = 05:30) Start the scheduled scan only when computer is on but not in use: Disabled Turn on e-mail scanning: Enabled Turn on heuristics: Enabled (could have left unconfigured, but wanted to be explicit)[/quote] Problem: when I try to make the "Specify the day of the week to run a scheduled scan" change above, after I click the OK button, the value changes from my Enabled setting to Disabled!

    What the heck is going on?


    My guess was that maybe I had some other setting that conflicted with this one, which was causing the auto reset to Disabled. I scoured thru all the settings, but found nothing.

    Please advise!


    Another problem: to see if a scheduled scan would take place, I tried temporarily changing the "Specify the time of day to run a scheduled scan" value to 2 minutes past my current time. When the current time reached that, no scan took place.


    Is the Group Policy alone insufficient to trigger a scan?


    ~~~~~~~~~~


    Doing more web searching, I eventually found out how to make Schedule tasks have Windows Defender do a full scan. As described in this link, you must supply these args to the MpCmdRun.exe program

    Code: Scan -ScheduleJob -ScanType 2[/quote] Question: what is considered the best way to configure Windows? Using tools like Schedule tasks? Or should I always try to get stuff to work via Group Policy of possible?

    I am new to Group Policy, but it seems like the more official and thorough way. Please confirm or deny, and further enlighten me.

    ~~~~~~~~~~

    If Group Policy is the way to go, there is one more setting that concerns me.

    Under Scan is a "Specify the maximum depth to scan archive files" setting.

    The default is 0, which, if I understand the help text (and all links I found when searched), means that it scans to 0 depth. In other words, it does not drill down inside any directories at all!

    That sounds awful, and stupid. It also contradicts how a setting of 0 in other contexts means there is no limit.

    I want a setting that drills down as deep as necessary into the archive, I want everything scanned!

    Any way to achieve that?

    I suppose that I could specify a really large value, but that it is an inelegant hack that should not have to do.

    :)
     
    up2trix, May 4, 2019
    #1

  2. defender scans

    Hi Ian,

    Thanks for posting your query on Microsoft Community.

    This issue might occur if you have set any task scheduler for Windows Defender.

    I suggest you to delete the task for Windows defender and check if it helps.

    Follow the below steps:


    • Search and open Schedule tasks.

    • In the left-hand menu, open the Task Scheduler Library, then select
      Microsoft >Windows >Windows Defender.

    • Double-click Windows Defender Scheduled Scan.

    • Select the Triggers panel, then select Delete.

    Hope it helps, reply to us with the status of your issue. We will be happy to assist you.
     
    Santosh_Rai, May 4, 2019
    #2
  3. Windows Defender Scheduled Scan

     
    anhnguyen19G&H, May 4, 2019
    #3
  4. mwidunn Win User

    scheduling Windows Defender full scan: problems and questions

    Windows Defender Scheduled Scan

    How do I get Windows Defender Scheduled Scan back in Task Scheduler?

    I go: Schedule tasks > Task Scheduler Library > Microsoft > Windows
    > Windows Defender.

    I had been messing around with the scheduler trying to make it work properly. Unfortunately, in the process I believe that I deleted the whole task (when I thought I was just deleting its properties and triggers).

    Is there any way to get Windows Defender Scheduled Scan back in the list of tasks?

    Thanks!
     
    mwidunn, May 4, 2019
    #4
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scheduling Windows Defender full scan: problems and questions

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