Windows 10: Windows defender threat service has stopped

Discus and support Windows defender threat service has stopped in Windows 10 BSOD Crashes and Debugging to solve the problem; https://prnt.sc/u8hf75 I've tried multiple fixes such as looking in registry editor and doing the Dism and sfc /scannow stuff in cmd but neither of... Discussion in 'Windows 10 BSOD Crashes and Debugging' started by DathanFisher, Aug 30, 2020.

  1. Windows defender threat service has stopped


    https://prnt.sc/u8hf75
    I've tried multiple fixes such as looking in registry editor and doing the Dism and sfc /scannow stuff in cmd but neither of those worked what should i do?

    :)
     
    DathanFisher, Aug 30, 2020
    #1
  2. Rhina Vib Win User

    Windows defender: "Threat service has stopped"

    Hi,

    For us to better assist you, we need to ask a few questions:

    • Which version of Windows are you using?
    • Were there any changes made before experiencing this issue?

    For steps to help resolve the issue, you can refer to
    cuda18
    's post on this
    link
    .

    Looking forward to your reply.

    Thank you.
     
    Rhina Vib, Aug 30, 2020
    #2
  3. Windows defender: "Threat service has stopped"

    Some users might be experiencing a glitch with starting the Threat Service (Windows Defender Antimalware Service) that was apparently delivered on Patch Tuesday. The first thing to try would be manually restarting the PC lots of times, with a break
    between the restarts (Start button > Power > Restart), as described by Le Boule in this thread:

    Windows Defender - Virus & Threat Protection - Restart Now

    This issue might also be related to the known glitch where the Security Center Service needs to be restarted in order to get Windows Defender up and running – so try this:

    • Manually restart the Security Center, and then attempt to start the Windows Defender Antivirus Service:

    1. Press Win Key + R

    2. Type “services.msc” and click OK.

    3. Right-click on Security Center and click
    Restart

    3. Right-click on the Windows Defender Antivirus Service and click
    Start.

    If that doesn't work, then you should follow these general troubleshooting steps:

    • Remove any undetected malware by scanning with several third-party malware-removal apps, starting with Malwarebytes Free:

    List of Malware Removal Tools

    • Run the cleanup tools for any previously installed or preinstalled AV apps:

    List of anti-malware product removal tools

    • Run the standard Windows 10 system integrity checks:

    System file check (SFC) Scan and Repair System Files & DISM to fix things SFC cannot

    Source thread:

    Defender stopped and cannot restart it

    If the above steps fail to start the Windows Defender Antivirus Service, then you can try the steps provided here:

    Problems starting Windows Defender in Windows 8/8.1/10

    I hadn’t noticed that

    PrashantKumar96
    actually advised setting DisableAntiSpyware = 0
    in this forum article. Before you do that, you should always try just deleting any possible entry for
    DisableAntiSpyware = 1, since that setting might have been added by another program or by malware – and that setting will always prevent Windows Defender from starting. For the sake of both ease and safety, this should be done with a REG command.

    Type “cmd” in the search box; and then right-click on
    Command Prompt and select Run as administrator.

    And then copy, paste, and enter this command:

    REG DELETE "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware

    This is the proper way to enable Windows Defender when it's been turned off via Group Policy.

    We can see that there’s a general confusion with respect to this Group Policy setting by the way that Brink equivocates deleting the
    DisableAntiSpyware entry with setting its value to 0.

    DisableAntiSpyware DWORD

    (delete) or 0 = On

    1 = Off

    How to Turn On or Off Microsoft Defender Antivirus in Windows 10

    But this setting actually uses a three-state logic, where the absence of the setting specifies the normal
    Automatic Disabled compatibility mode for Windows Defender.
    Setting DisableAntiSpyware = 0 sets Windows Defender's operational state to “always on” [DisableAntiSpyware = 0 (logical “no/never”)], whereas [DisableAntiSpyware = 1 (logical “yes/always”)] sets Defender’s
    operational state to “always off”; and where removing the DisableAntispyware registry entry simply returns Defender to its default operational state – where Defender will be automatically disabled by the installation of any third-party AV app, and
    automatically enabled when a third-party AV app is uninstalled.

    As the "method of last resort", you can set the Group Policy for Windows Defender to its “always on” mode:

    Type “cmd” in the search box; and then right-click on Command Prompt and select
    Run as administrator.

    And then copy, paste, and enter this command:

    REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 0 /f

    Then click the Restart button (it might be necessary to restart the PC first).

    If this doesn’t work, then you should remove this setting with the REG DELETE command provided above.
    Note that this REG ADD command is just the safe and easy way to perform the registry edit that was described in the answer to this thread:

    https://answers.microsoft.com/en-us...-stopped/5724ac44-80ff-4a2f-a3a5-46686a92edd9

    No internet-connected PC is safe when it's running without real-time protection. So if you’re not able to restart the Windows Defender Antivirus Service, then the best course of action would be to just temporarily install a free third-party AV solution
    until we can get a handle on things. Replacing Defender with a third-party AV app should at least provide you with a viable alternative for Defender’s real-time protection, and thus let you safely connect to the internet:

    https://www.pcmag.com/article2/0,2817,2388652,00.asp
     
    GreginMich, Aug 30, 2020
    #3
  4. Windows defender threat service has stopped

    WD: "Threat services has stopped" I'm unable to restart/reactivate.

    I am not able to activate viruses and threat protection in windows defender

    it says threat services has stopped. Restart it now. But nothing happens.

    I tried but I am not able to activate viruses and threat

    any suggestions regarding this issue? please do reply

    * Original title: windows defender
     
    Insiya_1996, Aug 30, 2020
    #4
Thema:

Windows defender threat service has stopped

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