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  1.    26 Apr 2016 #80
    Join Date : Apr 2016
    Posts : 3
    Win 10

    Hi,
    i wanted to turn on the defender, but i've problem turning it on, i've tried using the "reg" and "local group policy editor", but still cannot turn on, it shown below screen after i tried the method from above. please help me to turn on the defender. thanks!

    Name:  2016_04_27_02_06_541.png
Views: 879
Size:  13.4 KB
      My ComputerSystem Spec
  2.    26 Apr 2016 #81
    Join Date : Oct 2013
    Posts : 24,321
    64-bit Windows 10 Pro build 17017
    Thread Starter

    Hello cfleong, and welcome to Ten Forums.

    Do you have a 3rd party AV program installed?

    If so, they will often disable Windows Defender to avoid conflicts between them.
      My ComputersSystem Spec
  3.    26 Apr 2016 #82
    Join Date : Apr 2016
    Posts : 3
    Win 10

    Quote Originally Posted by Brink View Post
    Hello cfleong, and welcome to Ten Forums.

    Do you have a 3rd party AV program installed?

    If so, they will often disable Windows Defender to avoid conflicts between them.
    Hi, i have uninstall the program and still find the same thing.
      My ComputerSystem Spec
  4.    26 Apr 2016 #83
    Join Date : Oct 2013
    Posts : 24,321
    64-bit Windows 10 Pro build 17017
    Thread Starter

    What program was it?
      My ComputersSystem Spec
  5.    27 Apr 2016 #84
    Join Date : Apr 2016
    Posts : 3
    Win 10

    It was Avast, after uninstall the program and few time restart, the defender has activated itself, thanks Brink!
      My ComputerSystem Spec
  6.    27 Apr 2016 #85
    Join Date : Oct 2013
    Posts : 24,321
    64-bit Windows 10 Pro build 17017
    Thread Starter

    Great news.
      My ComputersSystem Spec
  7.    09 May 2016 #86
    Join Date : Apr 2016
    Posts : 7
    Windows 10 verson1511

    Thank You Sir Brink i`was using avira free AV for long time when i had XP win7 now using win10 but in this days Avira av eating a lot off ram n making slow the system. just removed Do WIN10 need 3ed party AV ?
      My ComputerSystem Spec
  8.    09 May 2016 #87
    Join Date : Apr 2016
    Craiova
    Posts : 41
    ten 64

    just as add , from my tests

    a.
    the OPTION ONE or OPTION TWO are the same thing
    just , option two can be applied silent , both reflect the same windows policy
    this for pro versions

    I don't know if in home versions , where on default the local group policy editor do not exist
    the option two can done the job

    the local group policy editor can be added in home versions
    but I don't know/tested if do this job correctly.

    b.
    if you apply OPTION TWO
    if you run somehow (Cortana,search,start....) windows defender
    you will get ALSO the picture from
    EXAMPLE: Windows Defender Turned Off (above)
    I mean not the presented picture from OPTION TWO.8
    so this mean you cannot re-start windows defender
    because you will have not the red start button to press

    the only way to restart windows defender after applying OPTION ONE or OPTION TWO
    is to UNDO them
    to undo for OPTION TWO
    delete the registry value [on default the registry value do not exist and defender is on]

    "DisableAntiSpyware"
    from key
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
    or give to this registry key the value 0 = ON
    no need restart , will be instant
    c.
    the picture from can OPTION TWO.8 can be reached
    ONLY with above policy enabled
    and service windefend not started [no running]
    for that you must change the registry value
    HKLM \SYSTEM\CurrentControlSet\services\WinDefend
    valuename "Start" to 4
    Automatic = 2 , Manual = 3 , Disabled = 4 , Automatic (Delayed Start) = 5

    but this registry key is protected and windows don't let you change

    but anyway is doable , for do that you must
    -apply OPTION TWO (set off policy = unprotect the start key)
    -restart
    this if not already done before
    -change start to 4 (service windefend will not start next boot)
    -restart
    -undo setting OPTION TWO (set on policy, but windefend service will remain stopped from now)
    nou you will have access to the presented picture in OPTION TWO.8

    OR change the start value with a program/script based on RunAsTI ( run as trusted installer)
    like I do

    OR maybe take ownership can do the job for start value in registry
    not tested , and I don't have such intention , because i am not a fan of this way
    [can be dangerous in future , in my opinion , malware can use this kind of door(s)]

    d.
    sorry if is so complicated my add
    you can just use OPTION TWO for disable/enable the policy and is ok

    c
      My ComputerSystem Spec
  9.    16 May 2016 #88
    Join Date : Jul 2015
    Posts : 19
    Windows 8.1

    This does not help. I diisabled Windows Defender using checkboxes but your reg file does not turn it on.
      My ComputerSystem Spec
  10.    16 May 2016 #89
    Join Date : Oct 2013
    Posts : 24,321
    64-bit Windows 10 Pro build 17017
    Thread Starter

    Quote Originally Posted by Anixx View Post
    This does not help. I diisabled Windows Defender using checkboxes but your reg file does not turn it on.
    Hello Anixx,

    Please provide more details about you did or used to disable Windows Defender.
      My ComputersSystem Spec

 
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