Windows 10: How do I reinstall Windows Defender back?

I just checked my laptop after my brother borrowed it and now Windows Defender is gone like it being uninstall permanently.

:)

 

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- .

 

how to reinstall windows defender?

The system is infected by miners and other malware, which have deleted your Defender executables completely. A repair installation is suggested.

Before that, please do the following:

• Download FixList.txt
  

• Save Fixlist.txt in the same folder where EnglishFRST64.exe is.
  
• Close all program windows.
  

• Launch the Farbar Scanner tool and click "Fix".
  
• Upload the output log file (FixLog.txt) to your OneDrive.
  

Once done, repair Windows 10. See How to perform an In-place Upgrade with Windows 10 Step-by-Step Guide - Microsoft Community:

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Windows Defender problem

Hi Ernst,

To troubleshoot this issue, we suggest that you check the Windows Defender service if it's running. If you are using a third party spyware/malware program, it may disable the Windows Defender service. To do this, please follow the steps below:

• Press Windows + R key.
• Type services.msc.
• Right-click Windows Defender service and click
  Start.

Let us know the result.