Oprava Nedá sa zapnúť program 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

Uistite sa, že ste vytvorili bod obnovenia pre prípad, že by sa niečo pokazilo.

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. Stlačte kláves Windows + X a potom vyberte Príkazový riadok (Admin).

2.Typ  sfc / scannow a stlačte 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 / Vyčistenie-Obraz / Obnovenie zdravia

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.

Metóda 3 – Vykonajte čisté spustenie

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 a stlačte kláves Enter.

2.On the system configuration Window, you need to navigate to Karta Služby where you need to check to Skryť všetky služby spoločnosti Microsoft a kliknite na Zakázať všetko tlačidlo.

3.Navigate na Startup section a kliknite na Otvorte Správcu úloh.

4.Here you will locate all startup programs. You need to kliknite pravým tlačidlom myši on each program and zakázať 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. Kliknite na OK.

6.You need to reboot your system and check if you’re able to Fix Can’t Turn ON Windows Defender issue alebo nie.

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 a stlačte Enter

2.Here you need to search for Security Center a potom kliknite pravým tlačidlom myši on Security Center and choose reštart možnosť.

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. Teraz stlačte Enter.

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

HKEY_LOCAL_MACHINESOFTWAREPolitikyMicrosoftWindows 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.

Poznámka: If you’re facing permission issues then right-click on Windows Defender a zvoľte Povolenia. 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.

Metóda 6 - Set Windows Defender Service to Automatic

Poznámka: Ak je služba Windows Defender v Správcovi služieb sivá, potom sleduj tento príspevok.

1. Stlačte kláves Windows + R a zadajte services.msc a stlačte kláves Enter.

2. V okne Služby nájdite nasledujúce služby:

Služba Windows Defender Antivirus Network Inspection Service
Antivírusová služba Windows Defender
Služba Centrum zabezpečenia programu Windows Defender

3. Dvakrát kliknite na každý z nich a uistite sa, že ich typ spustenia je nastavený na automaticky a kliknite na Štart, ak služby ešte nie sú spustené.

4. Kliknite na tlačidlo Použiť a potom na tlačidlo OK.

5. Reštartujte počítač, aby ste uložili zmeny a zistili, či je to možné Fix Can’t Turn ON Windows Defender issue.

Metóda 7 - Set Correct Date & Time

1.Click na dátum a čas na paneli úloh a potom vyberte „Nastavenia dátumu a času. "

2. Ak máte Windows 10, urobte „Nastaviť čas automaticky"To"on. "

3. Pre ostatných kliknite na „Internetový čas“ a začiarknite políčko „Automaticky synchronizovať s internetovým časovým serverom. "

4. Vyberte Server “time.windows.com“ a kliknite na aktualizovať a na „OK“. Nie je potrebné dokončiť aktualizáciu. Stačí kliknúť na tlačidlo OK.

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. Stiahnite si a nainštalujte CCleaner & Malwarebytes.

2.Spustite Malwarebytes a nechajte ho skenovať váš systém, či neobsahuje škodlivé súbory.

3.Ak sa nájde škodlivý softvér, automaticky ho odstráni.

4. Teraz bežte CCleaner a v časti „Čistič“ na karte Windows odporúčame začiarknuť nasledujúce položky, ktoré sa majú vyčistiť:

5. Keď sa ubezpečíte, že sú skontrolované správne body, jednoducho kliknite Spustiť čistič, a nechajte CCleaner bežať.

6. Ak chcete vyčistiť systém, vyberte kartu Registry a uistite sa, že sú začiarknuté nasledujúce položky:

7. Vyberte možnosť Scan for Issue (Vyhľadať problém) a povoľte CCleaneru skenovať, potom kliknite Opravte vybrané problémy.

8. Keď sa CCleaner spýta “Chcete zálohovať zmeny v registri?” vyberte Áno.

9. Po dokončení zálohovania vyberte možnosť Opraviť všetky vybrané problémy.

10. Reštartujte počítač, aby ste uložili zmeny a zistite, či je to možné Fix Can’t Turn ON Windows Defender issue.

Method 9 – Update Windows Defender

1. Stlačte kláves Windows + X a potom vyberte Príkazový riadok (Admin).

2. Zadajte nasledujúci príkaz do cmd a po každom stlačte Enter:

“%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. Stlačením klávesu Windows + I otvorte Nastavenia a potom kliknite na „Aktualizácia a zabezpečenie“.

2. Teraz v ľavom okne vyberte možnosť Windows Update.

3. Ďalej kliknite na „Skontrolovať aktualizácie“ a nechajte Windows stiahnuť a nainštalovať všetky čakajúce aktualizácie.

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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.