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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72 additional answers

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  1. Anonymous
    2015-08-26T09:51:02+00:00

    As in my post above I could not get beyond stage 14

    I had already removed Avast but still had Spybot installed

    Today I removed Spybot and Windows Defender was easily enabled so that solved my problem.

    Its strange however that Spybot and Defender both run on without conflict on my older laptop running Vista

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  2. Anonymous
    2015-08-26T03:15:25+00:00

    This is simply not right. I am running AVG for Windows 10 and Malwarebytes - no problems, no nags.

    I have had no problems with Malwarebytes since very early in the preview period and did not install AVG until it was confirmed as Windows 10 ready.

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  3. Anonymous
    2015-08-26T02:55:42+00:00

    I tried this method, followed all the way; when I was to start those two tasks, it did not allow me to start. gave me an error message. " Error 577: Windows cannot verify the digital signature for this file. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software form an unknown source. "

    A little background.

    I am running Windows 10 ( direct upgrade from Windows 7 ultimate , not clean install )

    4 G RAM, 32-bit

    My computer was Vista when I bought it , I installed Windows 7 almost right after I got this laptop, and using that system till now.

    I think it might be my computer's hardware limitation, but all the information you posted was very helpful !!!

    Thank you

    I get the same 577 error. I do have a Windows Defender icon but it will not start. Had to put Avira free on for now.

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  4. Anonymous
    2015-08-26T02:27:20+00:00

    would not get beyond step 14

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