Why does Action Center tell me "Windows Defender needs to scan?" Solved


  1. ALN
    Posts : 64
    Windows10 Pro
       #1

    Why does Action Center tell me "Windows Defender needs to scan?"


    It's my understanding that Defender scans according to Microsoft's maintenance schedule. But I get a notice in the Action Center that "Windows Defender needs to scan." My last scan occurred 4-5 days ago when I noticed the alert.

    Is it possible that since my computer is powered down at bed time that the scheduled scan is skipped (and not started next morning when I power it up?

    How often is Defender scheduled to scan?

    Thanks for your help!
    Al
      My ComputersSystem Spec

  2. Cliff S's Avatar
    Posts : 22,596
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       #2

    If the computer is powered down at maintenance time, it will do it the next time you power up(and after a few minutes when the PC is idle).
    Why does Action Center tell me "Windows Defender needs to scan?"-image-001.png

    Why does Action Center tell me "Windows Defender needs to scan?"-image-002.png
    Do you possibly have Windows Defender checked in Disk Cleanup?
    Why does Action Center tell me "Windows Defender needs to scan?"-image-003.png
    Uncheck as it clears Defenders logs, and Windows will think you have not run a scan yet.

    Same thing goes if you have Ccleaner:
    Why does Action Center tell me "Windows Defender needs to scan?"-image-004.png
      My ComputersSystem Spec


  3. ALN
    Posts : 64
    Windows10 Pro
    Thread Starter
       #3

    Thanks Cliff S for the very detailed reply. My Task Scheduler settings are as shown in your illustrations, so looks like Defender is scheduled to run at power up. I do run Disk Cleanup on occasion, and if it detects Defender files, I would not have omitted them from the clean up options (At this time, Defender does not show up in clean up). I also run CCleaner regularly, and I did have Defender ticked for clean up. So looks like that was the issue. Thanks again for your work on this site!
      My ComputersSystem Spec

  4. Cliff S's Avatar
    Posts : 22,596
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       #4

    You're most welcome:)
      My ComputersSystem Spec

  5. eLPuSHeR's Avatar
    Posts : 1,881
    Windows 10 Home x64
       #5

    I have never had any trouble cleaning WD data with the built-in disk cleanup util. CC on the other hand...
      My ComputerSystem Spec


 

Related Threads
Solved Windows Defender "Scan Type Index" in AntiVirus, Firewalls and System Security
I found out how to see the event logs for Windows Defender scans from a thread on eightforums ("Windows Defender - where are the Scan Results?"). I just ran a full scan, but Windows Defender apparently ran a quick scan afterwards, so there is no...
Greetings All, I have two questions and hope experts on the Forum are able to help resolving them. 1) Is there a way to add "Project" (to a second screen) to the Action Center Quick Actions at the bottom of the notification panel. ...
hi..my problem is that the "action center" shows "no entry symbol" .. and "show app notification" is greyed out (unable to swicth on or off).. is there any chance to fix them.. thx by the way i did follow tutorial from this link Action Center -...
Hi I merged the reg file Add "Scan with Windows Defender" to Context Menu found here https://www.tenforums.com/tutorials/18145-scan-windows-defender-context-menu-add-windows-10-a.html and it works well but when I run Update and scan from the...
Our Sites
Site Links
About Us
Windows 10 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 10" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd
All times are GMT -5. The time now is 08:28.
Find Us