Windows 10: Windows Defender never completes analysis.

Hello.I have been facing this issue on windows 11 for more than a year which obliges me each and every time to find alternatives antiviruses. Had to download Avast and Kaspersky for multiple times as my Windows Defender would never complete a full analysis.It scans for less than a minute, stops at around 250 fields, than indicates that the scan is complete and no threat has been detected.I have done my best to uninstall all residual datas from previous Antiviruses without any result using regedit and MyPc driver Disk :C folders. I also proceeded to RevoUninstaller and CCleaner Both free v

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Windows Updated(16299.309).KB4088776 Restart is required to complete.

Hi dalchina. Good news, I followed your suggestion and reinstalled the update and now it appears as "installed correctly" *Biggrin Maybe it was not necessary to run the Windows Update Troubleshooter or maybe if necessary. But using it I do not think it could have worsened something. The installation was very fast, unlike the first time it showed step 1 and step 2 completed.

Thanks for the suggestions and for the time to respond Best regards.


And thanks for the tip of that program, I'll have it on my list.

 

Windows Defender not completing scans

Hi,

Thank you for posting your query on Microsoft Community.

As per the description, I understand that you are facing issues using Windows Defender.

I would suggest you to go through the below methods:

Method 1: Set Windows Defender to Automatic

You can set the Windows Defender service to Automatic, Disabled or Manual. Setting it to automatic might solve the problem. Follow these steps:

• 
  Click Start > type services in the Search box > click Services in the Programs list.
  
  2. Search for Windows defender.
  
  3. Double-click Windows Defender, and click Automatic in the start-up box > click OK.
  
• 
  

Method 2: Run SFC scan, it will check, if there is any kind of corruption on the operating system.

• 
  Press WIN+X.
  
• 
  Click on command prompt with admin.
  
• 
  Type sfc /scannow and press enter.
  
• 
  Reboot the computer once finished.
  

Method 3: Try the below link:

https://support.microsoft.com/en-us/kb/931849

Hope this information helps. Please let us know if you need any other assistance with Windows in future. We will be happy to assist you.

 

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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