Windows 10: Cannot start windows defender

Discus and support Cannot start windows defender in AntiVirus, Firewalls and System Security to solve the problem; I am unable to start windows defender via the security center nor the services window Looking at the event log (system) all I see is this: The... Discussion in 'AntiVirus, Firewalls and System Security' started by owen gerig, Sep 4, 2018.

  1. Cannot start windows defender


    I am unable to start windows defender via the security center nor the services window


    Looking at the event log (system) all I see is this:

    The Windows Defender Antivirus Service service failed to start due to the following error:
    The parameter is incorrect.

    Try to start via services window has a slightly different error message:

    Windows could not start the Windows Defender Antivirus Servie service on Local Computer. Error 87: The parameter is incorrect.

    :)
     
    owen gerig, Sep 4, 2018
    #1

  2. window defender


        • You will want to print these instructions for offline reference -
    IMPORTANT => DON'T SKIP ANY STEP perform all Steps in one uninterrupted session - If a Step says to reboot
    reboot.

    Problems starting Windows Defender in Windows 8/8.1/10

    Pləase let us know what fixes the problem or if the pяoblem remains.


        • `~`
     
    José Antonio Pontón Posada CEO, Sep 6, 2018
    #2
  3. Jay Jap Win User
    Windows Defender Anitvirus

    Hello,

    There are multiple reasons why you are having issues, enabling Windows Defender. To assist you with your concern, you can refer to
    PrashantKumar96's
    Forum Article
    on how to fix Windows Defender not starting.

    We suggest that you try the troubleshooting steps listed there, especially the number six troubleshooting step.

    Let us know of the outcome.

    Regards.
     
    Jay Jap, Sep 6, 2018
    #3
  4. Cannot start windows defender

    Windows Defender problem

    Hi Ernst,

    To troubleshoot this issue, we suggest that you check the Windows Defender service if it's running. If you are using a third party spyware/malware program, it may disable the Windows Defender service. To do this, please follow the steps below:

    • Press Windows + R key.
    • Type services.msc.
    • Right-click Windows Defender service and click
      Start.

    Let us know the result.
     
    Rafael Com, Sep 6, 2018
    #4
Thema:

Cannot start windows defender

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