Windows 10: Error: You’ll need a new app to open this windowsdefender when trying to launch Windows...

Discus and support Error: You’ll need a new app to open this windowsdefender when trying to launch Windows... in AntiVirus, Firewalls and System Security to solve the problem; I recently purchased a pre-built PC which with winver shows Version 1809 - OS Build 17763.1039. Any time I try to open Windows Defender, it shows... Discussion in 'AntiVirus, Firewalls and System Security' started by gimblo, Feb 25, 2020.

  1. GIMBLO
    gimblo Win User

    Error: You’ll need a new app to open this windowsdefender when trying to launch Windows...


    I recently purchased a pre-built PC which with winver shows Version 1809 - OS Build 17763.1039.


    Any time I try to open Windows Defender, it shows this error message: https://prnt.sc/r75jye lightshot


    Searching for Windows Security in All Apps shows this list: https://prnt.sc/r75k50


    I attempted going through regedit, changing owners and permissions, but nothing worked. The only thing I found that would hint at having Windows Defender was this tab in regedit: https://prnt.sc/r75kji


    However, no information is seemingly stored in Security Center: https://prnt.sc/r75knb




    ***Modified title from: Windows Defender apparently not installed on PC***

    :)
     
    gimblo, Feb 25, 2020
    #1
  2. GREG CARMACK - MVP
    Greg Carmack - MVP Win User
    Greg Carmack - MVP, Feb 25, 2020
    #2
  3. LAURENCE_111
    Laurence_111 Win User
    You'll need need a new app to open this : windowsdefender

    Good Day,

    I just got a new computer with a windows 10 home in it. I want to turn off windows defender but I cant seem to turn it off. It gives a pop up that says 'You'll need need a new app to open this : windowsdefender'. This is affecting other window settings I
    wish to open as well and it is annoying. Can anyone give me an immediate solution to this? Note it is a NEW windows 10 home. Thanks very much
     
    Laurence_111, Feb 25, 2020
    #3
  4. SDIPBLUE
    SDipBlue Win User

    Error: You’ll need a new app to open this windowsdefender when trying to launch Windows...

    new install Windows 10 1809 - You'll need a new app to open this windowsdefender

    New computer - all clean, installed windows 10 pro v1809 - All works, but Anything I click on that pertains to windows security (in settings) - simply brings up a dialog box "You'll need a new app to open this windowsdefender" and does nothing else. Not
    even sure windows defender is on with this error. Others since late Dec 2018 are reporting this as well - No solution yet. Please help. Tried all obvious stuff.
     
    SDipBlue, Feb 25, 2020
    #4
Thema:

Error: You’ll need a new app to open this windowsdefender when trying to launch Windows...

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