Microsoft has released an update to fix that behavior, see Update KB4052623: Microsoft fixes Defender ScanSkip Bug. See also the marked answer.
Windows Defender, "Items Skipped During Scan"
I keep getting this notification after quick scans, "Windows Defender skipped an item due to exclusions or network protection settings."
To make this clear: I don't have ANY exclusions, and as far as I'm aware, I haven't changed my network protection settings in the past.
What's going on? Is this malware, or a bug with the new update? How do I fix this? I want to be reassured that I'm safe, this isn't very reassuring.
EDIT: Thank you to Techradar for bringing this issue to light. If any employees read this, could you perhaps re-title it in a way which doesn't make users feel so endangered by the bug? All of us have come to the conlusion that (especially with MBAM) we should be clear.
Windows for home | Windows 10 | Security and privacy
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Reza-Ameri 45,896 Reputation points Volunteer Moderator
2020-03-25T15:51:49+00:00 As it has been said update would fix the issue and if you want details from official Microsoft Website it is:
https://support.microsoft.com/en-us/help/4052623/update-for-windows-defender-antimalware-platform
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Anonymous
2020-03-25T07:24:54+00:00 Hello to you all,
I don't usually comment on websites like these, but this recent issue with Windows Defender Antivirus really cost me so much time chasing my tail trying to work out what was going on.
Anyway, I have recently searched manually for updates for Windows 10 and the following two files were downloaded and installed today:
Security Intelligence Update for Windows Defender Antivirus - KB2267602 (Version 1.313.24.0)
Update for Windows Defender Antivirus antimalware platform - KB4052623 (Version 4.18.2003.8)
After re-starting my laptop (don't ask me why I did it), I straight away carried out a quick scan of my laptop using Windows Defender Antivirus and the problem with the notification of "Item skipped during scan" had gone.
I wish you all luck after downloading the updates and hope you have the same outcome as I did.
Cheers from Australia!
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Anonymous
2020-03-23T02:25:10+00:00 I getting the same message/problem and I'm also worried too. :(
I filed the problem through Feedback Hub, but don't how to find my report?
Hopefully Microsoft will fix it sometime soon?
I did a complete reinstall from USB key of my Windows 10. The problem disappeared until I ran Windows Updates, which installed KB4551762 and KB4537572 (which is NET Framework update, I believe). Then the problem came back. I think it is the KB4551762 that does it?