Windows 10: Windows Defender scans

When scanning drive with Defender, the 1st seems to take longer than the 2nd with same content getting re-scannedI.e if it takes 1 hour and 30 minutes to get to half way though a scan, a re-scan of the same size may only be half that time.My question is, does Defender use some sort of scan technology to 'rush' or simulate a scan?Technically, when doing a custom scan on USB3 drive connected to USB3 port, selected all content in root folder, it took 2 hours to scan, wouldn't subscript scans take the same?In this case, the 2nd scan is quicker even though it's exactly same contect selected and e

:)

 

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

Hi Joe,

to scan external drives using Windows Defender, follow the steps provided below.

• Open Windows Defender.
• Go to Settings tab.
• Select the Advanced option.
• tick the checkbox for Scan removable drives.

Regards.

 

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..