Windows 10: Windows Defender Antivirus refuses to start & unknown status

Discus and support Windows Defender Antivirus refuses to start & unknown status in Windows 10 Ask Insider to solve the problem; I'm currently on Windows 10 - 1909. Windows defender refuses to start. The status is always "unknown". When I try to enable the real time protection... Discussion in 'Windows 10 Ask Insider' started by /u/TechByrder, Jun 30, 2020.

  1. Windows Defender Antivirus refuses to start & unknown status


    I'm currently on Windows 10 - 1909. Windows defender refuses to start. The status is always "unknown". When I try to enable the real time protection nothing happens.

    I'm currently on Windows 1909. Windows defender refuses to start. The status is always "unknown". When I try to enable the real time protection nothing happens. No other antivirus is installed.

    There are no errors in the event log. MsMpEng.exe is running in the background

    Current Version info:

    Service Version: 4.18.2005.5

    Engine Version: 1.1.17200.2

    AntiSpyware Signature Version: 1.319.502.0

    AntiVirus Signature Version: 1.319.502.0

    https://i.imgur.com/9cxO541.png

    What I already tried:

    1. Reverting to an older Windows Defender version
    2. SFC
    3. DISM
    4. Chkdsk
    5. Checking the registry if Windows defender is disabled
    6. Installing the definition update manually
    7. Virus-scan with Hitman Pro, Kaspersky Antivirus Tool (no installation), Adwcleaner

    Do you have some more ideas?

    Thanks

    submitted by /u/TechByrder
    [link] [comments]

    :)
     
    /u/TechByrder, Jun 30, 2020
    #1
  2. afornal Win User

    Defender AntiVirus

    There are 4 options under Defender. Two refer to AntiVirus; AntiVirus Network Inspection Service & AntiVirus Services. Under Startup Type these two are listed as manual and the Status column said Inspection Service is running. When I clicked on the Start
    button in Properties, I got an immediate message: "Win.. Def.. Anti.. Serv.. on local comp.. started and then stopped. Some services stop automatically if they are not in use by other services or programs."
     
    afornal, Jun 30, 2020
    #2
  3. davidhk Win User
    Windows Defender disabled and is unable to start


    OK. I am not sure if you can complete the steps below.......................
    In the search box, type services.msc > Enter
    Items in the Services box are listed alphabetically.
    Scroll down to Windows Defender Service...........................
    at Status heading, it should be.................................... Running
    at Startup type, it should be......................................... Automatic


    Windows Defender Antivirus refuses to start & unknown status [​IMG]




    If that is not what yours said, right click at Windows Defender Service > click Properties >
    can you change the Startup type to Automatic and Service status to Start ?
    If yes, do so and click OK when done.
     
    davidhk, Jun 30, 2020
    #3
  4. humbird Win User

    Windows Defender Antivirus refuses to start & unknown status

    humbird, Jun 30, 2020
    #4
Thema:

Windows Defender Antivirus refuses to start & unknown status

Loading...
  1. Windows Defender Antivirus refuses to start & unknown status - Similar Threads - Defender Antivirus refuses

  2. Can't start Windows Defender Antivirus

    in AntiVirus, Firewalls and System Security
    Can't start Windows Defender Antivirus: I have a laptop that came with McAfee and Bitdefender software. Both subscriptions expired. I uninstalled both so that I can just use Windows defender, but it won't start. I get the following message: "Your Virus & threat protection is managed by your organization". I...
  3. Windows Defender Antivirus refuses to update

    in Windows 10 Installation and Upgrade
    Windows Defender Antivirus refuses to update: Hello. I am here with another problem with my laptop. I am using Windows 10 build 1809 too. I want to install build 1909, but as I do so, it does say Windows Defender is pending an update, and after lots of minutes, even almost an hour, it gets stuck on: "Security...
  4. Windows Defender Status: Unknown, Realtime protection cant be turned on and same as the...

    in AntiVirus, Firewalls and System Security
    Windows Defender Status: Unknown, Realtime protection cant be turned on and same as the...: It all happen sudden, just yesterday it was working fine the only thing i think that caused this is a trojan from a usb drive but windows defender already quaraitine it and for some reason i cant delete it, then the day after the windows defender became unknown, windows...
  5. windows defender antivirus

    in AntiVirus, Firewalls and System Security
    windows defender antivirus: hi, in my windows defender security center's virus and threat protection it says "Your virus and threat protection is managed by your organization". How can i change it....
  6. Defender achieves best antivirus status.

    in AntiVirus, Firewalls and System Security
    Defender achieves best antivirus status.: Thought I would share this Windows Defender Achieves 'Best Antivirus' Status 138051
  7. Windows Defender Antivirus

    in AntiVirus, Firewalls and System Security
    Windows Defender Antivirus: So, i downloaded a virus, have been trying to get rid of it for days now, its taken hold of my antivirus, windows defender for Windows 10, it says "your antivirus is managed by your organization" can anyone help? i have no idea what to do, im trying to download a 2nd...
  8. Windows Defender Antivirus scan couldn't be started

    in AntiVirus, Firewalls and System Security
    Windows Defender Antivirus scan couldn't be started: "The group or resource is not in the correct state to perform the requested operation" Can someone help me on the above message please? https://answers.microsoft.com/en-us/protect/forum/all/windows-defender-antivirus-scan-couldnt-be-started/a0e0a523-caf7-4098-8221-036c349b47cc
  9. Windows Defender Antivirus wont start

    in AntiVirus, Firewalls and System Security
    Windows Defender Antivirus wont start: Hello, I have a 4 day old new HP computer and I want to run Windows Defender. I had a free trial version of McAfee. I uninstalled McAfee using their uninstaller. Windows Defender antivirus wont start. I get a message: "unexpected error. sorry, we ran into a problem please try...
  10. Windows 10 - Windows Defender Antivirus will not START.

    in AntiVirus, Firewalls and System Security
    Windows 10 - Windows Defender Antivirus will not START.: I have a relatively new Lenovo laptop with "10' and one day I noticed DEFENDER ANTIVIRUS WAS OFF [a RED "X"] and when I tried to START IT, I get a popup window that says: UNEXPECTED ERROR. SORRY, WE RAN INTO A PROBLEM. PLEASE TRY AGAIN. (NO KIDDING) That was several weeks...