Windows 10: Windows Defender boot time scan.

I am running 1903 on 3 laptops and have not been able to get Window Defenders boot time scan to work on any of them. I assume this being that their is no clear visual indication that one is running as it supposedly scans and no where in the log does it indicate that a successful scan has occurred as well as the time of completion is very quick like 10 seconds. I have not even been able to get Windows Defender to scan in "safe mode" in two of the laptops and I have not tried on the third laptop. I go to the Settings>Update&Security>Windows Security>Open Windows Security> and get a blank screen when I am in "safe mode" and this occurred on both laptops.


If I go to Event Viewer>Application and Services Log>Microsoft>Windows>Windows Defender>Operational I get a message as follows

"Windows Defender Antivirus Configuration has changed. If this is an unexpected event you should review the settings as this may be the result of malware."


Please try to understand the reason for knowing that boot time scan is working is because you might have to use it or have to use it. The reason I try to use it is not important what is important is that it works if and when I get infected so information about the reason it may not work is not useful however how to get it to work every time with out fail is useful. Being that I would never check this log, an had problems finding this information in the log, the assertion of "if this is an unexpected event" seems a bit cruel and an indication that their seems to be a bit of a confusion as to why one would run a boot time scan.


I have run DISM using all 3 of it's main command line options and then after that I run sfc /scannow which I have done on all the computers that I have updated to 1903.


Log Name: Microsoft-Windows-Windows Defender/Operational
Source: Microsoft-Windows-Windows Defender
Date: 6/25/2019 5:34:18 AM
Event ID: 5007
Task Category: None
Level: Information
Keywords:
User: SYSTEM
Computer: LAPTOP-N13L026S
Description:
Windows Defender Antivirus Configuration has changed. If this is an unexpected event you should review the settings as this may be the result of malware.
Old value: N/A\Scan\OfflineScanRun =
New value: HKLM\SOFTWARE\Microsoft\Windows Defender\Scan\OfflineScanRun = 0x0
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="Microsoft-Windows-Windows Defender" Guid="{11cd958a-c507-4ef3-b3f2-5fd9dfbd2c78}" />
<EventID>5007</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>0</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2019-06-25T10:34:18.913730000Z" />
<EventRecordID>124</EventRecordID>
<Correlation />
<Execution ProcessID="4128" ThreadID="3740" />
<Channel>Microsoft-Windows-Windows Defender/Operational</Channel>
<Computer>LAPTOP-N13L026S</Computer>
<Security UserID="S-1-5-18" />
</System>
<EventData>
<Data Name="Product Name">%%827</Data>
<Data Name="Product Version">4.18.1905.4</Data>
<Data Name="Old Value">N/A\Scan\OfflineScanRun = </Data>
<Data Name="New Value">HKLM\SOFTWARE\Microsoft\Windows Defender\Scan\OfflineScanRun = 0x0</Data>
</EventData>
</Event>


NO error message that does not present itself right now in a boot time scan is acceptable.

How can I get the boot time scan in Windows Defender to work?

:)

 

Windows Defender Scans

Windows Defender is set to scan weekly but every time I boot up I get the message "Windows Defender needs to scan your computer". Sometimes I boot up once a day, sometimes I boot up 3 or 4 times in a day - has anyone any ideas as to why this is happening.

I am running Windows 10 (updated) and have CCleaner 5.25 - some suggestions say to un-check Windows Defender in CCleaner- but Windows Defender is not listed anywhere in CCleaner (I have gone through all the subheadings).

<Moved from Windows>

 

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.

 

right click scan in windows defender?


thanks for that.. i didn't notice the tutorial section :x

I did the suggested registry change and it's now listed on the desktop context menu.. but all this does is ask if I want to open it, update, or start a scan... I was hoping for the option where you right click a specific file and it will have listed 'scan with windows defender' like other antivirus programs have.. MSE had it. I'll keep looking around to see if I can find it in the meantime..