Windows 10: My Windows is nearly unusable after a black screen during a Defender scan, with missing...

I encountered an issue while working on a PDF file using Adobe Acrobat. I was attempting to format the file for a specific purpose when my system began to lag significantly, likely due to memory constraints as the file was quite large. When I tried to save the file, the window started to stutter and became difficult to interact with.Assuming it might be a virus, I opened Windows Defender and initiated a quick scan. However, during the scan, my screen suddenly went black. I had to forcefully shut down the system and reboot. When I tried to open the same file again, the system froze, and the sam

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defender scans

Hi Ian,

Thanks for posting your query on Microsoft Community.

This issue might occur if you have set any task scheduler for Windows Defender.

I suggest you to delete the task for Windows defender and check if it helps.

Follow the below steps:

• 
  Search and open Schedule tasks.
  
• 
  In the left-hand menu, open the Task Scheduler Library, then select
  Microsoft >Windows >Windows Defender.
  
• 
  Double-click Windows Defender Scheduled Scan.
  
• 
  Select the Triggers panel, then select Delete.
  

Hope it helps, reply to us with the status of your issue. We will be happy to assist you.

 

Windows defender custom scan does not scan external drives

I have Defender Windows 10. I tried using custom scan to select and scan external drives. The screen listing the drives comes up, but the "OK" button remains grayed out so unable to scan any of the drives listed. Any suggestions would be appreciated.

 

Cannot schedule scans for Windows Defender

Hi Nathaniel,

As per the description, you are experiencing issue with you can’t schedule scans for Windows defender and getting error message pop ups: “The combination of properties that task is using is not compatible with the scheduling
engine” on the system.

I certainly understand your concern and appreciate all your efforts in trying to fix this issue.

There could be a possibility that this issue might have occurred if there are corruptions in Windows defender services.

I would suggest you to try the following methods and check if that helps.

Method 1:

You can enable the Windows Defender either from control panel or from services.

Step 1:
Enable Windows Defender from control panel

• Press Windows + X, Click on control panel.
• On right top corner click on View and then choose large items.
• Now from the list click on Windows Defender and try to enable it.

If not try to enable it from services.

Step 2:
Enable Windows Defender from services.msc.

• Press Windows + R, to open run prompt.
• Type services.msc and press enter to open services list.
• Under services look from Windows defender service and start the service and set to automatic.

Note: If the services are already started, then click on the option that says: “Restart the service” and check if that helps.

If the issue persists, follow method 2

Method 2:

How to use the System File Checker tool to repair missing or corrupted system files, please follow the steps in the link provided below.

https://support.microsoft.com/kb/929833?

Note: System File Checker is a utility in Windows that allows users to scan for corruptions in Windows system files and restore corrupted files. This article describes how
to run the System File Checker tool (SFC.exe)to
scan your system files and to repair missing or corrupted system files in Windows 8.1 or Windows 8.
If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected.

All the above steps holds good for Windows 10 as well.

I hope this information is helpful.

Please do let us know if you need any further assistance, we will be glad to assist you.

Thank you.