Windows 10: Can't re-enable Win Defender

I disabled Win Defender in order to troubleshoot Thunderbird.

I can't re-enable, because the option is now greyed-out - see screenshot.

Please advise me how to re-enable Win Def.

Thanks.

:)

 

Windows defender is not going to enable manually....

Hi,

Windows Defender Antivirus works help protect your device by scanning for malicious or unwanted software and uses real-time protection to scan everything you download or run on your device. To efficiently assist you, we'd like to gather more information:

• What is the exact error message you received?
• Are you able to use Windows Defender before?

Meanwhile, we suggest that you follow the steps in this article on how to turn on/off Windows Defender.

Let us know if you need further assistance.

 

I want to enable Windows Defender

Hello,



This issue might be caused by system conflict. For us to know more, please answer the following:

• Can you provide us the result of SFC?
• Are you getting any error messages?

Also, we suggest checking this article to know more on how to enable Windows Defender.



Get back to us and keep us updated.

 

How reinstall windows defender

Hello LucianN1, my name is Irisdiel and I am an independent advisor.

I suggest you follow the instructions down below.

Step 1: Enable Windows defender from control panel

1. Press Windows + X, Click on control panel.

2. On right top corner click on View and then choose large items.

3. Now from the list click on Windows Defender and try to enable it.

If not try to enable it from services.

Step 2: Enable Window defender from services.msc.

1. Press Windows + R, to open run prompt.

2. Type services.msc and press enter to open services list.

3. Under services look from Windows defender service and start the service.

I also suggest you refer to the link down below.

URL:
https://answers.microsoft.com/en-us/protect/for...

Hope this helps!

Thank you and good luck,

Regards- .