La solució no es pot 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.

Also, if you go to 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

Assegureu-vos de crear un punt de restauració per si alguna cosa va malament.

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.Premeu la tecla Windows + X i després seleccioneu Símbol del sistema (Administrador).

2.Tipus  sfc / scannow i premeu 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.

Mètode 3: feu l'arrencada neta

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

1.Press Windows + R and type msconfig i prem Entrar.

2.On the system configuration Window, you need to navigate to Pestanya Serveis where you need to check to Amaga tots els serveis de Microsoft i feu clic al botó Inhabilita tot botó.

3.Navigateu a Startup section i feu clic a Obriu el gestor de tasques.

4.Here you will locate all startup programs. You need to feu clic amb on each program and Desactiva all of them one by one.

5.After disabling all startup applications you need to come back to the system configuration window to save all the changes. Fer clic a OK.

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.Press Windows + R and type services.msc i premeu Enter

2.Here you need to search for Centre de seguretat i després feu clic amb on Security Center and choose Reinicia opció.

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.Press Windows + R and type regedit. Ara premeu Enter.

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

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Defensar

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 i 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.

Mètode 6 - Set Windows Defender Service to Automatic

Nota: Si el servei de Windows Defender està en gris al Gestor de serveis, aleshores segueix aquesta publicació.

1.Premeu la tecla Windows + R i després escriviu services.msc i prem Entrar.

2.Cerqueu els serveis següents a la finestra Serveis:

Servei d'inspecció de xarxa antivirus de Windows Defender
Servei antivirus Windows Defender
Servei del centre de seguretat de Windows Defender

3.Feu doble clic a cadascun d'ells i assegureu-vos que el seu tipus d'inici estigui configurat a Automàtic i feu clic a Inicia si els serveis encara no s'estan executant.

4. Feu clic a Aplicar seguit de D'acord.

5.Reinicieu el vostre PC per desar els canvis i veure si podeu Fix Can’t Turn ON Windows Defender issue.

Mètode 7 - Set Correct Date & Time

1. Feu clic a la icona data i hora a la barra de tasques i després seleccioneu “Configuració de data i hora".

2.Si a Windows 10, feu que "Estableix l'hora automàticament"A"on".

3. Per a altres, feu clic a "Hora d'Internet" i marqueu "Sincronitza automàticament amb el servidor d'hora d'Internet".

4.Seleccioneu el servidor "time.windows.com" i feu clic a Actualitzar i "D'acord". No cal que completeu l'actualització. Només cal que feu clic a D'acord.

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.Descarregueu i instal·leu CCleaner & Malwarebytes.

2.Executeu Malwarebytes i deixeu-lo escanejar el vostre sistema per buscar fitxers nocius.

3.Si es troba programari maliciós, l'eliminarà automàticament.

4.Ara corre CCleaner i a la secció "Netejador", a la pestanya Windows, us suggerim que comproveu les següents seleccions a netejar:

5.Un cop us hàgiu comprovat que els punts adequats estan marcats, feu clic Executar Cleaner, i deixeu que CCleaner segueixi el seu curs.

6. Per netejar encara més el vostre sistema, seleccioneu la pestanya Registre i assegureu-vos que estigui marcat el següent:

7.Seleccioneu Scan for Issue i permet que CCleaner escanegi i, a continuació, feu clic Solucioneu els problemes seleccionats.

8. Quan CCleaner demana "Voleu canvis de còpia de seguretat al registre?” seleccioneu Sí.

9.Un cop finalitzada la còpia de seguretat, seleccioneu Arregla tots els problemes seleccionats.

10. Reinicieu l'ordinador per desar els canvis i veure si podeu Fix Can’t Turn ON Windows Defender issue.

Method 9 – Update Windows Defender

1.Premeu la tecla Windows + X i després seleccioneu Indicador d'ordres (Admin).

2.Escriviu l'ordre següent a cmd i premeu Enter després de cadascuna:

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

“%PROGRAMFILES%Windows DefenderMPCMDRUN.exe” -SignatureUpdate

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

Method 10 – Update Windows 10

1.Premeu la tecla Windows + I per obrir Configuració i després feu clic a "Actualització i seguretatIcona ".

2.Ara, des del panell de la finestra de l'esquerra, assegureu-vos de seleccionar Actualització de Windows.

3. A continuació, feu clic a "Buscar actualitzacions” i permet que Windows baixi i instal·li qualsevol actualització pendent.

Recomanat:

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.