Windows 10: Windows Defender will not turn on *SOLVED*

Anonymous
2014-11-18T03:53:50+00:00

I had recently disabled windows defender on windows 10 and when I did I know want to enable it again but when I open action center and press Turn On Now it does nothing. I have pressed it multiple times and with no result.


Fix:

  1. press Windows Key + R
  2. type regedit
  3. locate the following path *HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS DEFENDER*
  4. Right Click this file and select permissions
  5. press Advanced
  6. where it says owner press change
  7. change the owner to your username
  8. Now press applythen ok
  9. select Full Controlfrom the permissions menu

(click the Widnows Defender folder)

  1. Find the value DisableAntiSpyware and DisableAntiVirus and set these values to 0

(explaination: double click each and where the 1 is put 0 and press ok)

  1. Open services.msc
  2. find Windows Defender
  3. there should be 2 services: Windows Defender Serviceand Windows Defnder Netwrok
  4. right click each and press start
  5. after you have started both restart your computer
  6. Run Windows Defend er

I Hope this Helps!

Feel Free to Reply

Windows for home | Windows 10 | Security and privacy

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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Anonymous
2014-11-22T09:20:06+00:00

Fix:

  1. press Windows Key + R
  2. type regedit
  3. locate the following path *HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS DEFENDER*
  4. Right Click this file and select permissions
  5. press Advanced
  6. where it says owner press change
  7. change the owner to your username
  8. Now press apply then ok
  9. select Full Control from the permissions menu

(click the Widnows Defender folder)

  1. Find the value DisableAntiSpyware and DisableAntiVirus and set these values to 0

(explaination: double click each and where the 1 is put 0 and press ok)

  1. Open services.msc
  2. find Windows Defender
  3. there should be 2 services: Windows Defender Service and Windows Defnder Netwrok
  4. right click each and press start
  5. after you have started both restart your computer
  6. Run Windows Defend er

I Hope this Helps!

Feel Free to Reply

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  1. Anonymous
    2015-12-09T22:38:42+00:00

    not able to do step 10 because in registry i am not able to find both values can u please help

    thanks in advance!!

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  2. Anonymous
    2015-12-09T14:45:07+00:00

    I have tried your suggestions to start Windows Defender in Windows 10. It was followed step by step but at the end Windows Defender Service in Services.msc could not be started. After restart, Windows could not be started. It had to restarted twice before it could be started. After restart Windows Defender error message has stopped from appearing on the screen but Window Defender could not be started. Under Update & Security it remains grey and Services.msc same could not be started. Windows Defender still can't be opened.

    Why it is so?

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  3. CrazyKats 19,595 Reputation points Volunteer Moderator
    2015-12-05T18:20:29+00:00

    I have managed to get to step 13 but I am unable to start either Windows Defender Serviceor Windows Defender Networkit comes up with error 577.

    how am I able to start the program so I can turn windows defender on?

    Is Defender the only antivirus you have on your PC?

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  4. Anonymous
    2015-12-05T18:08:52+00:00

    I have managed to get to step 13 but I am unable to start either Windows Defender Serviceor Windows Defender Networkit comes up with error 577.

    how am I able to start the program so I can turn windows defender on?

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