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Windows Defender - Real Time Protection Won't Turn On

K_Dunc asked on

Hi all,

I've read many posts on this site already regarding Windows Defender - regrettably, here's another.  Here is my situation: I have a laptop that originally had XP.  I upgraded to the free Windows 10 version.  I did have an anti virus installed.  At one stage, I think I had some Trend version.  I have completely uninstalled all AV versions that I'm aware of.  I've even used the ESET AV Remover Tool - it returned zero results.  I see nothing obvious in the "Apps & features" list.  I've updated my registry to turn Windows Defender on (link), but to no avail.  I have uninstalled Windows Security Essentials as per this link.  For the first time, that turned on "Virus and spyware definitions", so I had a feeling that I was finally getting somewhere; however, WD continues to suggest that it's "handled by another AV program."

Where to from here please?

Thanks,

Kirk.

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The answered status icon Answer

Or, if you are comfortable with Command Prompt, you can run this command as Administrator (courtesy of GreginMich):

REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware /t REG_DWORD /d 0 /f

Just press Win key + X and click on 'Command Prompt (Admin)' for quickly opening CMD window.

Prashant Kumar

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The answered status icon Answer

Since you have Windows 10 Pro, you can follow these steps as alternative to Step 8 from the wiki:

  1. Press Win key + R. This will open Run dialog.
  2. Type "gpedit.msc" and hit Enter.
  3. Navigate to Computer Configuration -> Administrative Template -> Windows Components -> Windows Defender.
  4. There you will find a setting called 'Turn off Windows Defender'. Change that policy to 'Disabled'.
  5. Restart the system and check Windows Defender again.

Prashant Kumar

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