La solución no puede activar Windows Defender

Fix Unable to turn on Windows Defender: Windows Defender is an inbuilt antimalware tool that detects virus and malware on your system. However, there are some instances when users experience that they are unable to turn on Windows Defender in Windows. What could be the reasons behind this problem? There are many users who explored that installing any third party antimalware software cause this problem.

Además, si vas a Settings > Update & Security > Windows Defender then you will see that the Real-time protection in Windows Defender is turned on but it’s greyed out and also everything else is turned off and you can’t do anything about these settings. Sometimes the main issue is that if you have installed a 3rd party Antivirus service then Windows Defender will shut itself off automatically. No matter what reasons are behind this problem, we will walk you through the methods to solve this problem.

Why can’t I turn on my Windows Defender?

One thing we need to understand that Windows Defender provides complete protection to our system. Therefore, not able to turn on this feature could be a serious problem. There are many reasons for you not being able to turn on Windows Defender in Windows 10 such as third-party Antivirus might be interfering, Windows Defender is turned off by group policy, incorrect date/time issue, etc. Anyway, without wasting any time let’s see How to fix the underlying cause of this issue using the below-listed troubleshooting guide.

Fix Unable to turn on Windows Defender in Windows 10

Asegúrate de crear un punto de restauración en caso de que algo salga mal.

Method 1 – Uninstall any third-party Antivirus software

One of the most common causes of Windows Defender not working is third-party antivirus software. Windows Defender automatically shuts itself down once it detects any third party anti-malware software installed on your system. Therefore, you need to first start uninstallation any third party antimalware software. Moreover, you need to make sure that uninstallation is done properly all residue files of that software otherwise it will keep creating a problem for Windows Defender to get started. You can use some uninstaller software that will remove all remnants of your previous antivirus. Once the installations finished, you need to restart your system.

Method 2 – Run System File Checker (SFC)

Another method that you can opt for is system file diagnosis and repair. You can use command prompt tool to check whether Windows Defender files are corrupted. Moreover, this tool repairs all corrupted files.

1.Presione la tecla Windows + X y luego seleccione Símbolo del sistema (Administrador).

2.Type  sfc / scannow y presiona enter.

3.This process takes some time so be patient while running this command.

4.In case sfc command did not resolve the problems, you can use another command. Just type the below-mentioned command and hit Enter:

DISM / Online / Cleanup-Image / RestoreHealth

5.It will scan thoroughly and repair corrupted files.

6.After completing these steps, check if you’re able to fix Can’t Turn ON Windows Defender issue or not.

Método 3: realizar un inicio limpio

Sometimes there are some third party applications cause this problem, you can easily find those ones by performing the clean boot function.

1.Presione Windows + R y escriba msconfig y presiona Enter.

2.On the system configuration Window, you need to navigate to Pestaña Servicios where you need to check to Ocultar todos los servicios de Microsoft y haga clic en el Deshabilitar todo del botón.

3.Navegar a Startup section y haga clic en Abra el Administrador de tareas.

4.Here you will locate all startup programs. You need to botón derecho del ratón on each program and Deshabilitar all of them one by one.

5.After disabling all startup applications you need to come back to the system configuration window to guardar todos los cambios. Hacer clic en DE ACUERDO.

6.You need to reboot your system and check if you’re able to Fix Can’t Turn ON Windows Defender issue o no.

To zero in on the issue you need to perform clean boot using this guide and find the problematic program.

Method 4 – Restart Security Center Service

Another method to get your Windows Defender problem solved is restarting security center service. You need to activate and ensure that certain services are enabled.

1.Presione Windows + R y escriba services.msc y presiona Enter

2.Here you need to search for Centro de seguridad y luego botón derecho del ratón on Security Center and choose Reanudar .

3.Now simply restart your device and check if the problem is solved or not.

Method 5 – Modify your registry

If you are still finding the problem in turning on the Windows Defender, you can opt for this method. You just need to modify the registry but before doing so make sure to create a backup of your Registry.

1.Presione Windows + R y escriba regedit. Ahora presione Entrar.

2.Once you open the registry editor here you need to navigate to:

HKEY_LOCAL_MACHINESOFTWAREPolíticasMicrosoftWindows Defender

3.Select Windows Defender then in the right window pane find DisableAntiSpyware DWORD. Now double click this file.

4.Set the value data to 0 and click OK to save the settings.

Nota: If you’re facing permission issues then right-click on windows Defender y seleccionar Permisos. Follow this guide in order to take full control or ownership of the above registry key and again set the value to 0.

5.Most probably, after doing this step, your Windows Defender will start working on your system properly without any problem.

Método 6 - Set Windows Defender Service to Automatic

Nota: Si el servicio de Windows Defender está atenuado en el Administrador de servicios, entonces sigue esta publicación.

1.Presione la tecla Windows + R y luego escriba services.msc y presiona Enter.

2.Busque los siguientes servicios en la ventana Servicios:

Servicio de inspección de red antivirus de Windows Defender
Servicio antivirus de Windows Defender
Servicio del Centro de seguridad de Windows Defender

3.Haga doble clic en cada uno de ellos y asegúrese de que su tipo de inicio esté configurado en Automático y haga clic en Iniciar si los servicios aún no se están ejecutando.

4.Haga clic en Aplicar y luego en Aceptar.

5.Reinicie su PC para guardar los cambios y ver si puede Fix Can’t Turn ON Windows Defender issue.

Método 7 - Establecer fecha y hora correctas

1.Haga clic en el fecha y hora en la barra de tareas y luego seleccione "Configuraciones de fecha y hora."

2.Si está en Windows 10, haga "Establecer hora automáticamente" a "on."

3.Para otros, haga clic en "Hora de Internet" y marque "Sincronizar automáticamente con el servidor de hora de Internet."

4.Seleccione Servidor “time.windows.com”Y haga clic en Actualizar y “Aceptar”. No es necesario completar la actualización. Simplemente haga clic en Aceptar.

Again check if you are able to Fix Windows Defender Does Not Start issue or not, if not then continue with the next method.

Method 8 – Run CCleaner and Malwarebytes

1.Descargar e instalar Ccleaner & Malwarebytes.

2.Ejecute Malwarebytes y deje que escanee su sistema en busca de archivos dañinos.

3.Si se encuentra malware, lo eliminará automáticamente.

4.Ahora corre Ccleaner y en la sección “Limpiador”, bajo la pestaña de Windows, sugerimos marcar las siguientes selecciones para limpiar:

5. Una vez que se haya asegurado de que estén marcados los puntos adecuados, simplemente haga clic en ejecutar limpiador, y deja que CCleaner siga su curso.

6. Para limpiar aún más su sistema, seleccione la pestaña Registro y asegúrese de que esté marcado lo siguiente:

7.Seleccione Buscar problema y permita que CCleaner escanee, luego haga clic en Arregla los problemas seleccionados.

8.Cuando CCleaner pregunta "¿Quieres hacer una copia de seguridad de los cambios en el registro?”Seleccione Sí.

9. Una vez que se haya completado la copia de seguridad, seleccione Solucionar todos los problemas seleccionados.

10.Reinicie su PC para guardar los cambios y ver si puede Fix Can’t Turn ON Windows Defender issue.

Method 9 – Uactualizar Windows Defender

1.Presione la tecla Windows + X y luego seleccione Símbolo del sistema (Admin).

2.Escriba el siguiente comando en cmd y presione Enter después de cada uno:

“%PROGRAMFILES%Windows DefenderMPCMDRUN.exe” -RemoveDefinitions -Todos

“%PROGRAMFILES%Windows DefenderMPCMDRUN.exe” -Actualización de firma

3.Once the command finish processing, close cmd and reboot your PC.

Method 10 – Update Windows 10

1.Presione la tecla Windows + I para abrir Configuración y luego haga clic en "Actualización y seguridadIcono

2.Ahora, desde el panel de la ventana de la izquierda, asegúrese de seleccionar Windows Update.

3.A continuación, haga clic en "Buscar actualizaciones”Y permita que Windows descargue e instale las actualizaciones pendientes.

Recomendado:

Hopefully, above mentioned all methods will help you to Fix Unable to turn on Windows Defender in Windows 10 Issue. However, you need to understand that these methods should be followed systematically. In case you have more questions related to this problem leave your comments below.