Has anyone found a way to disable Windows Defender in Windows 11 ?

user655362020

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What I have tried :

Tamper protection was disabled when I tried below mentioned things :

1. Suspend MsMpEng.exe from Resource Monitor and enable Turn off Microsoft Defender Antivirus Group policy. The policy reverts itself after reboot.
2. Use WinAero Tweaker.
3. Defender Control

The Antimalware Service Executable is still running.
 

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

abactuon

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What I have tried :

Tamper protection was disabled when I tried below mentioned things :

1. Suspend MsMpEng.exe from Resource Monitor and enable Turn off Microsoft Defender Antivirus Group policy. The policy reverts itself after reboot.
2. Use WinAero Tweaker.
3. Defender Control

The Antimalware Service Executable is still running.
This is not a recommendation, but in Win 10 you can use install_wim_tweak.exe:
install_wim_tweak.exe /o /c "Windows-Defender" /r

 

My Computer

System One

  • Operating System
    Microsoft Windows 10 Home (x64)
    Computer type
    Laptop
    Manufacturer/Model
    MSI GF65 Thin 9SD
    CPU
    Intel Core i5-9300H
    Motherboard
    MSI MS-16W1
    Memory
    2 x Kingston KHX2666C15S4/16G
    Graphics Card(s)
    GeForce GTX 1660 Ti
    Sound Card
    Intel Cannon Lake-H/S - cAVS
    Monitor(s) Displays
    AU Optronics B156HAN13.0
    Screen Resolution
    1920 x 1080
    Hard Drives
    1. Noname 128GB SSD
    2. SAMSUNG MZVLB512HAJQ
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user655362020

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This is not a recommendation, but in Win 10 you can use install_wim_tweak.exe:
install_wim_tweak.exe /o /c "Windows-Defender" /r

Any way to disable it without removing it ? I don't want break windows install/cause issues with windows update.
 

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

abactuon

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Any way to disable it without removing it ? I don't want break windows install/cause issues with windows update.
Wait for the final release. There will be more information.
 

My Computer

System One

  • Operating System
    Microsoft Windows 10 Home (x64)
    Computer type
    Laptop
    Manufacturer/Model
    MSI GF65 Thin 9SD
    CPU
    Intel Core i5-9300H
    Motherboard
    MSI MS-16W1
    Memory
    2 x Kingston KHX2666C15S4/16G
    Graphics Card(s)
    GeForce GTX 1660 Ti
    Sound Card
    Intel Cannon Lake-H/S - cAVS
    Monitor(s) Displays
    AU Optronics B156HAN13.0
    Screen Resolution
    1920 x 1080
    Hard Drives
    1. Noname 128GB SSD
    2. SAMSUNG MZVLB512HAJQ
    PSU
    180W
    Mouse
    HP USB Fingerprint Mouse
    Internet Speed
    50 Mbps
    Browser
    Firefox

user655362020

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10

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

abactuon

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Remembered there is a program Defender Control v1.9
_Defender Control v1.9

"Defender Control is a portable tool featured within a simplistic UI that permits you to one-click disable/enable or even launch Windows Defender.

The need to disable Windows Defender can help speed up the overall time when you find yourself copying large amounts of data to and from your PC or USB or having a conflict between Windows Defender and another type of antivirus solution. It can also benefit users with a machine that is a little light on resources or have a top-notch alternative installed."

I did not use it. Windows 10, of course.
 

My Computer

System One

  • Operating System
    Microsoft Windows 10 Home (x64)
    Computer type
    Laptop
    Manufacturer/Model
    MSI GF65 Thin 9SD
    CPU
    Intel Core i5-9300H
    Motherboard
    MSI MS-16W1
    Memory
    2 x Kingston KHX2666C15S4/16G
    Graphics Card(s)
    GeForce GTX 1660 Ti
    Sound Card
    Intel Cannon Lake-H/S - cAVS
    Monitor(s) Displays
    AU Optronics B156HAN13.0
    Screen Resolution
    1920 x 1080
    Hard Drives
    1. Noname 128GB SSD
    2. SAMSUNG MZVLB512HAJQ
    PSU
    180W
    Mouse
    HP USB Fingerprint Mouse
    Internet Speed
    50 Mbps
    Browser
    Firefox

user655362020

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Thread Starter
Local time
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Remembered there is a program Defender Control v1.9
_Defender Control v1.9

"Defender Control is a portable tool featured within a simplistic UI that permits you to one-click disable/enable or even launch Windows Defender.

The need to disable Windows Defender can help speed up the overall time when you find yourself copying large amounts of data to and from your PC or USB or having a conflict between Windows Defender and another type of antivirus solution. It can also benefit users with a machine that is a little light on resources or have a top-notch alternative installed."

I did not use it. Windows 10, of course.
I already tried Defender Control
 

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

endeavor

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Remembered there is a program Defender Control v1.9
_Defender Control v1.9

v1.9 does Not fully work on Win11 like it did on Win10, because after a short period it turns itself back on.

I'm sure they will fix that in the next build though
 

My Computer

System One

  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

user655362020

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v1.9 does Not fully work on Win11 like it did on Win10, because after a short period it turns itself back on.

I'm sure they will fix that in the next build though
I think windows security now checks if an antivirus program is running and if not then turns defender back on.
 

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

abactuon

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Has already 'Administrative Templates (.admx) for Windows 11' ?
 

My Computer

System One

  • Operating System
    Microsoft Windows 10 Home (x64)
    Computer type
    Laptop
    Manufacturer/Model
    MSI GF65 Thin 9SD
    CPU
    Intel Core i5-9300H
    Motherboard
    MSI MS-16W1
    Memory
    2 x Kingston KHX2666C15S4/16G
    Graphics Card(s)
    GeForce GTX 1660 Ti
    Sound Card
    Intel Cannon Lake-H/S - cAVS
    Monitor(s) Displays
    AU Optronics B156HAN13.0
    Screen Resolution
    1920 x 1080
    Hard Drives
    1. Noname 128GB SSD
    2. SAMSUNG MZVLB512HAJQ
    PSU
    180W
    Mouse
    HP USB Fingerprint Mouse
    Internet Speed
    50 Mbps
    Browser
    Firefox

TairikuOkami

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Any way to disable it without removing it ? I don't want break windows install/cause issues with windows update.
Install 3rd party AV, disable Defender's services, uninstall 3rd party AV.
 

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My Computer

System One

  • Operating System
    Windows 11 Home
    CPU
    AMD Ryzen 5 3600 (07/19)
    Motherboard
    MSI B450 TOMAHAWK 7C02v1H6 (07/19)
    Memory
    4x 8GB ADATA XPG GAMMIX D10 DDR4 3200MHz CL16
    Graphics Card(s)
    MSI Radeon RX 580 ARMOR 8G OC (08/19)
    Sound Card
    Creative Sound Blaster Z (11/16)
    Monitor(s) Displays
    24" AOC G2460VQ6 (01/19)
    Screen Resolution
    1920×1080@75Hz + FreeSync (DisplayPort)
    Hard Drives
    ADATA XPG GAMMIX S11 Pro SSD 512GB (07/19)
    PSU
    Seasonic M12II-520 80 Plus Bronze (11/16)
    Case
    Lian Li PC-7NB + 3x Noctua NF-S12A FLX@700rpm (11/16)
    Cooling
    CPU Cooler Noctua NH-U12S@700rpm
    Keyboard
    HP Pavilion Wireless Keyboard 600 (05/21)
    Mouse
    HP Wireless Silent 280M Mouse (05/21)
    Internet Speed
    300/30 Mbps via RouterOS (05/21) + TCP Optimizer
    Browser
    Microsoft Edge
    Antivirus
    None
    Other Info
    Headphones: Sennheiser RS170 (09/10) + Software: https://tinyurl.com/7hkjyhsj

endeavor

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I think windows security now checks if an antivirus program is running and if not then turns defender back on.
There are a number of things at play, you can read about it here and there with ways around it.
I've only briefly tested them, but I'm not in a hurry either way to solve it since 11 is just in beta
 

My Computer

System One

  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

endeavor

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Install 3rd party AV, disable Defender's services, uninstall 3rd party AV.


TairikuOkami, is this your place on your sig?


Is that what you use = your Microsoft Defender Disable.bat?

Since it was last updated a few months ago, I thought it was not tested on Win11 yet?
 

My Computer

System One

  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

TairikuOkami

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Is that what you use = your Microsoft Defender Disable.bat?

Since it was last updated a few months ago, I thought it was not tested on Win11 yet?
Yes. 11 has not changed anything in terms of Defender.
 

My Computer

System One

  • Operating System
    Windows 11 Home
    CPU
    AMD Ryzen 5 3600 (07/19)
    Motherboard
    MSI B450 TOMAHAWK 7C02v1H6 (07/19)
    Memory
    4x 8GB ADATA XPG GAMMIX D10 DDR4 3200MHz CL16
    Graphics Card(s)
    MSI Radeon RX 580 ARMOR 8G OC (08/19)
    Sound Card
    Creative Sound Blaster Z (11/16)
    Monitor(s) Displays
    24" AOC G2460VQ6 (01/19)
    Screen Resolution
    1920×1080@75Hz + FreeSync (DisplayPort)
    Hard Drives
    ADATA XPG GAMMIX S11 Pro SSD 512GB (07/19)
    PSU
    Seasonic M12II-520 80 Plus Bronze (11/16)
    Case
    Lian Li PC-7NB + 3x Noctua NF-S12A FLX@700rpm (11/16)
    Cooling
    CPU Cooler Noctua NH-U12S@700rpm
    Keyboard
    HP Pavilion Wireless Keyboard 600 (05/21)
    Mouse
    HP Wireless Silent 280M Mouse (05/21)
    Internet Speed
    300/30 Mbps via RouterOS (05/21) + TCP Optimizer
    Browser
    Microsoft Edge
    Antivirus
    None
    Other Info
    Headphones: Sennheiser RS170 (09/10) + Software: https://tinyurl.com/7hkjyhsj

endeavor

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Yes. 11 has not changed anything in terms of Defender.
Actually yes it has changed, there are/is at least one new variable that turn it back on as compared to what they did in Win10, but perhaps your way with your Microsoft Defender Disable.bat takes care of it no matter what, as compared to Defender Control that was mentioned previously in this thread.
I will give your bat a try then and test it for gp (general purposes) since I've got Win11 all setup on the tower next to me.

btw, your place there at GitHub:

...nice work! I see you just updated the Windows Tweaks.bat a few minutes ago, might even give that a go..
 

My Computer

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  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

user655362020

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I'll give it a try too
 

My Computer

System One

  • Operating System
    Windows 11
    Computer type
    PC/Desktop
    CPU
    Intel Pentium G4560
    Motherboard
    GA-H110M-S2 (rev 1.x)
    Memory
    8 GB Vengeance LPX DDR4 PC4-19200 2400MHz
    Graphics Card(s)
    Nvidia GT 730 2GB GDDR5
    Sound Card
    Realtek Audio
    Monitor(s) Displays
    LG 20MP48AB (19 Inch IPS)
    Screen Resolution
    1440x900

endeavor

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I'll give it a try too

Well a few things I've found already, and now I see TairikuOkami warns us about it in his
Microsoft Defender Disable.bat
..where he says:
rem You need to run twice or restart and run the .bat again to disable services (MsMpEng.exe) !!!!!
rem If it does not work, install 3rd party AV temporarily, then run .bat and uninstall 3rd party AV.

..and now I see that's very important, because after first running the Microsoft Defender Disable.bat, within 15 minutes I got a prompt from Defender even though it was off, and it said:
I circled in red one of the things it did

prompt.jpg

..and then tracking the reg/file changes with my software I noticed Defender Did Remove these 2 keys that the ..bat added when I first ran it, I saw they were added, I saw it:


removes.jpg


..but then Defender removes them
So, again, as TairikuOkami says in his ...bat
rem You need to run twice or restart and run the .bat again to disable services (MsMpEng.exe) !!!!!
rem If it does not work, install 3rd party AV temporarily, then run .bat and uninstall 3rd party AV.

I do believe him

I'm out of time for today to play, but it was fun :)

Now on Win10 of course I do have an alternative AV installed, but just didn't have time to do that yet with Win11, and will do on another day of play.. ..okay back to work now!
 

My Computer

System One

  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

JMedlock83

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Can it not be disabled through the Group Policy Editor?
 

My Computers

System One System Two

  • Operating System
    Windows 11 Pro x64
    Computer type
    PC/Desktop
    CPU
    AMD Ryzen 1800X
    Motherboard
    Asus Crosshair VI Hero
    Memory
    16GB
    Graphics Card(s)
    AMD Radeon R290
    Sound Card
    On Board
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    Pavilion 27xi
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    1920X1080
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    WD 500GB SSD
    4TB HDD (extra storage)
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    Apevia 1100 Watt Worlock
    Case
    NZXT
    Cooling
    Air Cooling
    Keyboard
    Logitech Ergonomic
    Mouse
    MX Master
    Internet Speed
    150Mbps/5Mbps
    Browser
    Chrome/Edge
    Antivirus
    Malwarebytes
  • Operating System
    Windows 10 Pro x64
    Computer type
    PC/Desktop
    CPU
    AMD FX 8350
    Motherboard
    Asus Crosshair V Formula Z
    Memory
    16GB
    Graphics card(s)
    AMD Radeon R290
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    On Board
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    AOC 27"
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    1920X1080
    Hard Drives
    250GB Intel SSD
    500GB Seagate
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    Cougar CMX 1000w
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    Air Cooling
    Mouse
    MX Master
    Keyboard
    Microsoft Ergonomic 4000
    Internet Speed
    150Mbps/5Mbps
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    Edge/Chrome
    Antivirus
    Malwarebytes

endeavor

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Look at the reg, it was already!
 

My Computer

System One

  • Operating System
    Vista/Win7/Win8/Win10/Win11 (x86/x64)
    Computer type
    PC/Desktop
    Manufacturer/Model
    ..all towers built from scratch
    CPU
    i7's
    Other Info
    ..including W98SE/WXP
    No VM's ..all OS's are live

TairikuOkami

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Trnava, SK
Can it not be disabled through the Group Policy Editor?
AV is pretty much a requirement in 11, just like TPM. If you disable 3rd part AV temporarily, Defender kicks in (when not disabled).
 

My Computer

System One

  • Operating System
    Windows 11 Home
    CPU
    AMD Ryzen 5 3600 (07/19)
    Motherboard
    MSI B450 TOMAHAWK 7C02v1H6 (07/19)
    Memory
    4x 8GB ADATA XPG GAMMIX D10 DDR4 3200MHz CL16
    Graphics Card(s)
    MSI Radeon RX 580 ARMOR 8G OC (08/19)
    Sound Card
    Creative Sound Blaster Z (11/16)
    Monitor(s) Displays
    24" AOC G2460VQ6 (01/19)
    Screen Resolution
    1920×1080@75Hz + FreeSync (DisplayPort)
    Hard Drives
    ADATA XPG GAMMIX S11 Pro SSD 512GB (07/19)
    PSU
    Seasonic M12II-520 80 Plus Bronze (11/16)
    Case
    Lian Li PC-7NB + 3x Noctua NF-S12A FLX@700rpm (11/16)
    Cooling
    CPU Cooler Noctua NH-U12S@700rpm
    Keyboard
    HP Pavilion Wireless Keyboard 600 (05/21)
    Mouse
    HP Wireless Silent 280M Mouse (05/21)
    Internet Speed
    300/30 Mbps via RouterOS (05/21) + TCP Optimizer
    Browser
    Microsoft Edge
    Antivirus
    None
    Other Info
    Headphones: Sennheiser RS170 (09/10) + Software: https://tinyurl.com/7hkjyhsj
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