Windows 10 - Defender Offline Scan not working

Hi,

Following the thread, the concern regarding Windows Defender offline scan not working properly seems to be related to a software conflict. To effectively assist you with your concern, we'd like to ask the following:

• Which Windows build is running on your device? Type winver in the search box and press Enter to help us identify.
• Did you get any error messages when performing the scan? If yes, attach a screenshot on your next post.
• What are the troubleshooting steps that you've performed to resolve your concern?

We're looking forward to your response.

Literally just bought my computer and Windows Defender Offline Scan doesn't do anything.

The png picture you provided **is** the WDO scan.

Once the scan is complete, the device restarts.

 - this scan, then restart is normal and unlike earlier Win10 1703 or earlier 1703 Insider Builds

Actually, that is not true.

Firstly, as I said, it worked before, showing me first that window, then the actual scan.

Secondly, that window stays for about 2 minutes (if the subsequent scan fails, otherwise it's less ; I've been thinking it may have something to do with updating the definitions), while a WDO-scan of even a new computer with an almost empty harddisk takes some 5 minutes.

Thirdly, acting on a suggestion from someone on another thread, I uninstalled the "2017-06 Cumulative Update for Windows 10 Version 1703 for x64-based Systems (KB4022716)" from June 28 I mentioned above, after which WDO worked normally again : first the window in the picture I provided, then the actual scan.

I then reinstalled the update, expecting WDO to fail again afterwards (which it didn't), but the update that was 'reinstalled' was "KB4022725", which is the same number as a cumulative update installed on June 13, while "KB4022716" seems to remain uninstalled.  WDO is now again working normally as before.

It is not my intention to antagonize you (or anyone, for that matter), but is it not a bit hazardous to say "[that] **is** the WDO scan", especially towards less experencied users who then think they are safely running a scan and their system is clean, while there actually is no scan being performed ?

Kind regards,

John.

Edit : for clarity, when WDO works normally, this is the window I first get :

https://www.groovypost.com/wp-content/uploads/2013/04/WDO-Launching.png

After about 30 seconds, this disappears and the scan window appears, looking something like this :

https://alssl.askleomedia.com/wp-content/uploads/2017/02/wdo-running.png

where I can click on the Update tab, minimize, maximize, ...

Hi, I have a slightly different problem with WDO.

Until a few days ago, it worked fine.  Now, it restarts my computer, even seems to start WDO, I get the small window titled "Windows Defender Offline" with the bar passing from left to right - looks like this :

https://www.groovypost.com/wp-content/uploads/2013/04/WDO-Launching.png

Normally after that I got the scan window, but now the program just finishes and my computer restarts, without scanning.

The png picture you provided **is** the WDO scan.

Once the scan is complete, the device restarts.

 - this scan, then restart is normal and unlike earlier Win10 1703 or earlier 1703 Insider Builds

Hi John,

This issue may have occurred due to software conflict. Since you've already tried some troubleshooting steps, we suggest that you perform a clean boot to correct this.

Note: Please go through the section: How to reset the computer to start as usual after troubleshooting with clean boot of the Kb article to boot the computer in normal startup after fixing the issue.

Kindly get back to us with the results.