How often does Defender do a quick scan?

  1. Bobby Phoenix's Avatar
    Posts : 467
    Windows 10 Pro 64-bit
       #1

    How often does Defender do a quick scan?


    I've been trying to find a solid answer on this question, but the web is not much help. I have three PCs that each run Windows Defender Quick Scan at different times (days between scans), and was wondering why. One scans every day, one scans every four days, and the other scans eight to ten days. When I look in Task Scheduler I only see when it was last run, but can't find when the next run is. Does anybody really know what triggers it, and where I can find the next run time?

    How often does Defender do a quick scan?-image.png
    How often does Defender do a quick scan?-image.png
    How often does Defender do a quick scan?-image.png
      My Computer

  2. Berton's Avatar
    Posts : 10,525
    Win10 Pro Versions 2004 and 2009/20H2, Win10 Pro IP_Dev, Win10 Home 1909
       #2

    Usually I see it run the Quick Scan after doing updates which can include Definitions and just about every time I plug in a USB Thumb drive or access a folder on one of my NAS drives.
      My Computers

  3. zebal's Avatar
    Posts : 907
    Windows 10 Pro x64 20H2 (Build: 19042.867)
       #3

    Bobby Phoenix said:
    I've been trying to find a solid answer on this question, but the web is not much help.
    I feel you pain!
    The more we use web more boring it gets, the trick isn't in how much time we spend searching but rather in memorizing universal keywords and bookmark good finds all the time!

    You can find answer to your in multiple places:
    1. GPO (Group Policy Object), for example:
    Specify the time for a daily quick scan
    This policy setting allows you to specify the time of day at which to perform a daily quick scan. The time value is represented as the number of minutes past midnight (00:00). For example, 120 (0x78) is equivalent to 02:00 AM. By default, this setting is set to a time value of 2:00 AM. The schedule is based on local time on the computer where the scan is executing
    This is just one, and there are many more.

    now about search engine keyword that finds it, it's called ATP which stands for "Advanced Thread Protection"
    You can find many interseting stuff here, including various types of schedules scans and how they work in different editions of Windows:

    Main page:
    https://docs.microsoft.com/en-us/win...at-protection/

    More technical stuff, good to search for details:
    https://docs.microsoft.com/en-us/mic...o365-worldwide

    https://docs.microsoft.com/en-us/win...virus-features

    https://docs.microsoft.com/en-us/win...nder-antivirus

    ATP seems to be no longer called ATP, my bookmarks no longer lead me to old finds, but in combination with GPO you can learn all the internals that concern your original question
      My Computer

  4. Bobby Phoenix's Avatar
    Posts : 467
    Windows 10 Pro 64-bit
    Thread Starter
       #4

    Thanks for the input. Appreciate it.
      My Computer

  5. zebal's Avatar
    Posts : 907
    Windows 10 Pro x64 20H2 (Build: 19042.867)
       #5

    This is link I missed find in my bookmarks, it accurately describes defender scans and gives GPO locations which describe different scans, defaults are described in GPO and from I recall apply to all editions of OS:

    https://docs.microsoft.com/en-us/win...nder-antivirus
      My Computer

  6. Fabler2's Avatar
    Posts : 2,958
    Windows 10 preview 64-bit Home
       #6

    You can configure scans with Defender but when Microsoft runs Quick scans outside these configurations is a mystery for a purpose I would assume.
      My Computers


 

  Related Discussions
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 22:04.
Find Us




Windows 10 Forums