Windows 10: Defender scans are extremely fast, is this cause for concern?

I have used Windows Defender exclusively for over a year. It scans every day and they take 30 seconds on average. I have an i7/16GB RAM/SSD system and it is barebones (a dozen programs that I use and that's it). I seldom download anything more than the occasional pdf and don't let my system get bogged down.

I have noticed this for a while now, but scans seem too quick. Not only do automatic scans take 30 seconds, but even full scans are less than 5 minutes. I never do the offline scans but those are likely the same thing. On my previous system, scans finished too fast and it turned out there was a deeper issue. But my current machine is pristine and I have no reason to think there is a problem. I haven't installed a new program in months and don't go in the registry or anything.

Should I be worried about scans being fast? My system seems healthy, but I want to be sure. Any tips on how to check up on my system in different ways besides Windows Defender?

submitted by /u/Lichkaiser
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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.

 

offline scan by win defender

Hi,

To further assist you with your concern with Windows Defender, follow the steps below:

• Open the Run window by pressing Window + R button.
• Then type services.msc and hit "Enter".
  
• Look for Windows defender service in the list and right click on it and select start.
• Once Windows defender is opened try to do the offline scan on that window.

Let us know how it goes.

 

On startup Windows Defender is not on and wants to scan

Hi,

To address your concern regarding Windows Defender, we suggest that you restart the Windows Defender Service with the steps below:

• Right click on Start and select Run.
• Type services.msc, then press Enter.
• Click the Windows Defender Service, and click Stop and then
  Start under General tab.
• Check Apply and OK.

Update us on the result.

Regards.