Fix Can’t Turn ON 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

Me whakarite ki te hanga i tetahi waahi whakaora mena ka raru tetahi mea.

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.Press Windows Key + X ka tīpako Whakaaetanga Whakatairanga (Kaiwhakahaere).

2.Momo  sfc / scannow a ka tomo.

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 / Pureup-Image / Whakaorahia te Hauora

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.

Tikanga 3 – Mahi Whakaoho Maama

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 ka tomo tomo.

2.On the system configuration Window, you need to navigate to Ripa Ratonga where you need to check to Hunahia nga Ratonga Microsoft katoa ka pāwhiri i te Monokia Katoa pātene.

3.Navigate ki Startup section ka pāwhiri ai Tuwhera Kaiwhakahaere Tūmahi.

4.Here you will locate all startup programs. You need to pāwhiri-matau on each program and Monokia 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. Pāwhiritia te OK.

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

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 ratonga.msc ka pa ki te tomo

2.Here you need to search for Haumarutanga Center a ka pāwhiri-matau on Security Center and choose Tīmata kōwhiringa.

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. Inaianei pehia Enter.

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

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Kaiwawao

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.

Tuhipoka: If you’re facing permission issues then right-click on Pūkaro Windows ka tīpako Nga Whakaaetanga. 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.

Tikanga 6 - Set Windows Defender Service to Automatic

Tuhipoka: Mēnā kua hina te ratonga Pūkaro Windows ki te Kaiwhakahaere Ratonga whai i tenei pou.

1.Press Windows Key + R ka pato ratonga.msc a ka tomo tomo.

2.Kimihia nga ratonga e whai ake nei i te matapihi Ratonga:

Ratonga Tirotiro Whatunga Whero Wheori Windows Defender
Windows Defender Antivirus Service
Ratonga Pokapū Haumarutanga Windows Defender

3.Pāwhiri-rua i runga i ia o ratou, ka whakarite i to ratou momo Whakaoho kua whakaritea ki Aunoa ka paato i te Tīmata mena kare ano nga ratonga i te whakahaere.

4.Patohia te Hoatu ka whai i te OK.

5. Whakahouhia to PC ki te tiaki i nga huringa ka kite mena ka taea e koe Fix Can’t Turn ON Windows Defender issue.

Tikanga 7 - Set Correct Date & Time

1.Click i runga i te ra me te wa i runga i te paetaumahi ka kowhiri "Te tautuhinga o te ra me te waa. "

2.Ki te Windows 10, hanga "Tautuhi Aunoa i te Wa"Ki"on. "

3. Mo etahi atu, pawhiria te "Waa Ipurangi" ka tohu tohu "Tukutahi aunoa ki te tūmau wā Ipurangi. "

4.Tīpakohia te Tūmau “wa.windows.com" ka paato i te whakahou me te "OK". Kaore koe e hiahia ki te whakaoti i te whakahou. Patohia noa 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.Tikiake me te tāuta CCleaner & Malwarebytes.

2.Whakahaerehia te Malwarebytes a kia matawai i to punaha mo nga konae kino.

3.Ki te kitea te kino ka tangohia aunoatia.

4.Na, rere CCleaner a i roto i te waahanga "Kaihoroi", i raro i te ripa Windows, ka whakaaro matou kia tirohia nga whiringa e whai ake nei hei horoi:

5.Ka oti ana koe te whakarite kua tirohia nga tohu tika, paato noa Rere Kaihoroi, a ka tuku a CCleaner ki te whakahaere.

6. Hei horoi i to punaha, tohua te ripa Rehita me te whakarite kia tirohia nga mea e whai ake nei:

7.Tīpakohia te Matawai mo te Putanga ka tuku a CCleaner ki te matawai, ka paato Whakatikahia nga take kua tohua.

8.Ka patai a CCleaner "Kei te pirangi koe ki nga huringa taapiri ki te rehita?” tohua Ae.

9. Kia oti to taarua, tohua Whakatikahia nga take kua tohua.

10. Tīmataria anō tō PC ki te tiaki i ngā huringa ka kite mēnā ka taea e koe Fix Can’t Turn ON Windows Defender issue.

Method 9 – Update Windows Defender

1.Press Windows Key + X ka tīpako Whakaaetanga Whakatairanga (Kaiwhakahaere).

2. Patohia te whakahau e whai ake nei ki te cmd ka pa ki te Whakauru i muri i ia waahanga:

“%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.Pēhia te Pātuhi Matapihi + I hei whakatuwhera i nga Tautuhinga ka paato i te "Whakahou & Haumarutanga"Icon.

2.Na i te pihanga matapihi maui-ringa kia mohio ki te tīpako Whakahōu Windows.

3. I muri mai, pawhiria te "Tirohia mo nga whakahou” ka tuku i a Windows ki te tango me te whakauru i nga whakahōu e tatari ana.

Manakohia:

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.