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  • Windows Defender SNAFU: “Items skipped during scan”

    Home Forums AskWoody blog Windows Defender SNAFU: “Items skipped during scan”

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      • #2209854 Reply
        woody
        Da Boss

        Günter Born is chasing an odd bug (at least, it looks like a bug). In Win10, when you run a scan in Windows Defender, it may tell you But there’s no i
        [See the full post at: Windows Defender SNAFU: “Items skipped during scan”]

        2 users thanked author for this post.
      • #2209869 Reply
        jhvance
        AskWoody Lounger

        I’ve seen that result for months on a 32Gb eMMC laptop that’s stuck at 1809 (because of space limitations), but could never figure out what it represented.  Of late, a full Windows Defender scan on that machine crashes at some point forcing a reboot — if it presents an error code, it’s too fleeting for me to catch — so I’ve opted for offline scans on that machine.

        2 users thanked author for this post.
      • #2209890 Reply
        bbearren
        AskWoody MVP

        I have two protected files (part of a utility I use) that Windows Defender skips routinely.  In addition, I have two tasks scheduled in Task Scheduler for a daily scan and a weekly scan with Windows Defender.  I’ve never seen that particular dialog box.

        Create a fresh drive image before making system changes/Windows updates, in case you need to start over!
        "When you're troubleshooting, start with the simple and proceed to the complex."—M.O. Johns
        "Experience is what you get when you're looking for something else."—Sir Thomas Robert Deware

        2 users thanked author for this post.
      • #2209921 Reply
        anonymous
        Guest

        Yup, started seeing it when defender updated to 4.18.2003.6 about 3 days ago, have no exceptions set seem to be lots of mentions of it popping up with general consesus being bug

        1 user thanked author for this post.
      • #2209929 Reply
        Seff
        AskWoody Plus

        I’ve seen it today for the first time, on my first manual scan in a week. As a new convert to W10 it’s taking me time to accept the idea that I don’t need to do manual scans any more!

        2 users thanked author for this post.
      • #2209936 Reply
        WildBill
        AskWoody Plus

        This is Only on Win10, right? I ran a Quick scan on Win8.1 this morning after updating & there were no problems.

        Windows 8.1, 64-bit, back in Group A... & leaning toward Windows 10 V2004. As long as it's a Lot Less Buggy!
        Wild Bill Rides Again...

      • #2209938 Reply
        Geo
        AskWoody Lounger

        So far MSE for W7 is not having any problems.

        1 user thanked author for this post.
      • #2209949 Reply
        The Surfing Pensioner
        AskWoody Plus

        Windows Defender on my desktop Win 10 Pro 1903 just completed a scheduled scan, all clear with no items skipped. Windows Defender is up-to-date.

      • #2209971 Reply
        CADesertRat
        AskWoody Plus

        I’m on version 1909 and WD ver 4.18.2003.6 scanned at 9:07 this morning without any messages. Sounds like some are getting the message in WD and some aren’t.

        Don't take yourself so seriously, no one else does 🙂
        4 Win 10 Pro at 1909 (3 Desktops, 1 Laptop).

        • #2209972 Reply
          b
          AskWoody Plus

          I think it may only be buggy on manual quick or full scans, but not automatic or scheduled scans.

          Windows 10 Pro Version 2004: Group ASAP (chump/pioneer)

          2 users thanked author for this post.
        • #2209996 Reply
          CADesertRat
          AskWoody Plus

          I think your right b since another of my 1909 machines automatically scanned this afternoon and there were no messages. UNLESS the message appears right after the auto scan and then goes away before I see it.

          Don't take yourself so seriously, no one else does 🙂
          4 Win 10 Pro at 1909 (3 Desktops, 1 Laptop).

          2 users thanked author for this post.
          b, woody
          • #2210022 Reply
            CADesertRat
            AskWoody Plus

            I just ran a Quick scan on my computer that I first reported on #2209971 and didn’t receive the message on the Quick scan either.

            Don't take yourself so seriously, no one else does 🙂
            4 Win 10 Pro at 1909 (3 Desktops, 1 Laptop).

      • #2209990 Reply
        gborn
        AskWoody_MVP

        I can reproduce it on my Win 10 V1909 test machine – let run a quick scan.

        From my German blog readers I got the feedback that 80% sees this message, while raw about 20% didn’t get the notification. No idea what’s behind that. My glance into the event logs didn’t show any entries.

        Microsoft Windows Insider MVP, Microsoft Answers Community Moderator, Blogger, Book author

        https://www.borncity.com/win/

        4 users thanked author for this post.
        • #2210159 Reply
          doriel
          AskWoody Lounger

          I didnt get this mysterious message neither on 1809Enterptrise (17763.1098) or 1909Pro (18363.418).
          Quick Defender scan.

          My glance into the event logs didn’t show any entries.

          This is what I say all the time. Its hard to know whats happening inside windows – errors like 0x8002bcf4 are useless to everybody and vague error messages like “Instalation failed” dont help at all.
          You see message “Wait until Windows updates your PC.”, then, after hour with no foreseen warning – crash.. error.. OMG, not again!
          Still.. going forward no matter what 🙂

          Dell Latitude E6530, Intel Core i5 @ 2.6 GHz, 4GB RAM, WX 1809 Enterprise

          HAL3000, AMD Athlon 200GE @ 3,4 GHz, 8GB RAM, Fedora 29

      • #2209994 Reply
        Steve S.
        AskWoody Plus

        I just ran a manual quick scan (Win 10 1909 up-to-date) and got the warning notification. I have nothing listed for exclusions. Since the notification says “due to exclusions or network scanning settings“, I checked settings. I do have the following policies set (via the use of O&O ShutUp):

        • Cloud-delivered protection: “off”
        • Automatic sample submission: “off”

        In addition, I have “controlled folders access” turned off. Not sure if this would impact Windows Defender.

        Maybe the bug has something to do with my two policy choices? Haven’t yet tested whether turning any of these to “on” makes a difference. I’ll check it later today, to see.

        Win7 Pro x64(Group B), Win10 Pro x64 1909, Win10 Home 1909, Linux Mint + a cat with 'tortitude'.

        • #2210023 Reply
          Steve S.
          AskWoody Plus

          Set both “Cloud-delivered protection” and “Automatic sample submission” to “on”, then ran manual scans for both Quick and Full. I still got the “items skipped” messages. So, no joy.

          Win7 Pro x64(Group B), Win10 Pro x64 1909, Win10 Home 1909, Linux Mint + a cat with 'tortitude'.

          2 users thanked author for this post.
        • #2210160 Reply
          RetiredGeek
          AskWoody MVP

          Steve,

          I have the same settings and I do not get the message on my 1909 Pro (build 18363.720) using either quick or full scan. I also have the following exclusions set.
          WD-Exclusions-Dell-8700
          However, on my Home version (laptop) same build and same exclusions I do get the message.

          HTH 😎

          May the Forces of good computing be with you!

          RG

          PowerShell & VBA Rule!
          Computer Specs

          • This reply was modified 1 week, 6 days ago by RetiredGeek.
          • This reply was modified 1 week, 6 days ago by RetiredGeek.
          Attachments:
          1 user thanked author for this post.
      • #2209998 Reply
        Neath1940
        AskWoody Plus

        Win10 Pro ver 1909
        I ran the the ‘Quick Scan’ and got the message. Running the ‘Full Scan’, I did not get the message. It appears that if it does not scan all of the files, you will get the message. Perhaps a change in behavior but the message is technologically correct– Items are skipped during the Quick Scan!

        • #2210021 Reply
          Steve S.
          AskWoody Plus

          I tried a Full Scan but still got the message. So that’s not the issue in my particular case.

          Win7 Pro x64(Group B), Win10 Pro x64 1909, Win10 Home 1909, Linux Mint + a cat with 'tortitude'.

      • #2210062 Reply
        DriftyDonN
        AskWoody Plus

        Bitdefender system scan when run the first couple of times takes quite some time. However, after a few runs it gets smart and remembers past scans and will ‘skip’ files. Quick scan is quite fast.

        Microsoft cannot write patches for poorly written OS as it is so why would they be any better at security software? I have seen praises for the new improved defender security but have also read(anecdotally) false positives. I am not surprised.

      • #2210063 Reply
        anonymous
        Guest

        IMHO, it’s probably caused by KB4052623 (update for Defender antimalware platform).

      • #2210090 Reply
        GreatAndPowerfulTech
        AskWoody Plus

        I ran a full manual scan today. There were no messages in defender, after the scan. But, there was a notification, after I closed defender, that an item was skipped, with no explanation.

        GreatAndPowerfulTech

      • #2210269 Reply
        Karlston
        AskWoody Plus

        FWIW, MSPoweruser has an article about it…

        https://mspoweruser.com/microsoft-update-breaks-antivirus-scans-windows-10/

         

        Hanlon's Razor: Never attribute to malice that which can be adequately explained by stupidity.

        3 users thanked author for this post.
      • #2210279 Reply
        geekdom
        AskWoody Plus

        No skipped item messages on either full manual scan or quick manual scan.

        G{ot backup} TestBeta
        offline▸ Win7Pro SP1 x64 InUse
        online▸ Win10Pro 1909.18363.752 x64 i5-9400 RAM8GB HDD Firefox75.0 Windows{Image/Defender/Firewall}
      • #2210299 Reply
        bbearren
        AskWoody MVP

        I can’t replicate it.  I ran a full scan with Windows Defender. Scanned 1,019,909 files, scan lasted 3 hours 37 minutes, no current threats, no “Items skipped during scan” popup.

        Windows 10 Version 1909 (OS Build 18363.720) fully updated.

        Create a fresh drive image before making system changes/Windows updates, in case you need to start over!
        "When you're troubleshooting, start with the simple and proceed to the complex."—M.O. Johns
        "Experience is what you get when you're looking for something else."—Sir Thomas Robert Deware

      • #2210342 Reply
        gborn
        AskWoody_MVP

        Found a workaround to supress the skip message – see my blog post

        Windows 10: Fix for skipped Defender scans

        Microsoft Windows Insider MVP, Microsoft Answers Community Moderator, Blogger, Book author

        https://www.borncity.com/win/

        2 users thanked author for this post.
        • #2210355 Reply
          Steve S.
          AskWoody Plus

          Thanks. I confirm that this gets rid of the message for me. I decided to leave the group policy as ‘not configured’. I’ll just delete or ignore the erroneous notification until Microsoft comes up with a bug fix. 😉

          Win7 Pro x64(Group B), Win10 Pro x64 1909, Win10 Home 1909, Linux Mint + a cat with 'tortitude'.

          1 user thanked author for this post.
      • #2210432 Reply
        John
        AskWoody Lounger

        This skipping happened on a desktop PC I just did a clean install of 1909. But I have noticed other issues on some other PC’s I maintain with Defender. One I noticed just seemed to stop doing automatic quick scans. The notebook in question runs 1909 had no instances of any other issues. But clearly had not done a quick scan in weeks.

      • #2210476 Reply
        RetiredGeek
        AskWoody MVP

        Just to save y’all some reading.

        Open a PowerShell session as Administrator.

        Type: $(Get-MpPreference).DisableScanningNetworkFiles
        This will show you your current setting.

        To change the setting:
        Set-MpPreference -DisableScanningNetworkFiles $False #This will ENABLE network scanning! Or $True to Disable network scanning.
        WDScanningErrorFix

        HTH 😎

        May the Forces of good computing be with you!

        RG

        PowerShell & VBA Rule!
        Computer Specs

        Attachments:
        1 user thanked author for this post.
      • #2210497 Reply
        EP
        AskWoody_MVP

        I just ignore the WD item skipped warnings as they don’t bother me
        No need for me to enable network scanning for Defender

        https://www.bleepingcomputer.com/news/security/windows-defender-fix-for-windows-10-enable-network-scanning/

        read gBorn’s comments in that BleepingComputer article

        • This reply was modified 1 week, 5 days ago by EP.
      • #2210720 Reply
        gborn
        AskWoody_MVP

        After I contacted Microsoft’s Windows Update group, we finally have a fix with update kb4052623

        Update KB4052623: Microsoft fixes Defender Scan Skip Bug

        Microsoft Windows Insider MVP, Microsoft Answers Community Moderator, Blogger, Book author

        https://www.borncity.com/win/

        3 users thanked author for this post.
      • #2210721 Reply
        gborn
        AskWoody_MVP

        FWIW, MSPoweruser has an article about it…

        https://mspoweruser.com/microsoft-update-breaks-antivirus-scans-windows-10/

         

        Well MSPU and WindowsLatest are the sites, that never credited other sources – so both went here on my black list – especially MSPU (after an internal battle, because their admins  marked me for ‘spamming’ due to 4 posts in 2 years to some of my blog posts containing additional details about topics they ‘also covered’ – beside many other sites …) ;-).

        Due to this experience, I decided to post here on askwoody.com – and I’m in contact with Lawrence Abrams from Bleeping Computer. Both sites are my 1st source for valuable information and information exchange (beside some German sites from blogging collegues).

        Forgot: I’m also in exchange with Bodgan Popa from Softpedia.

        Microsoft Windows Insider MVP, Microsoft Answers Community Moderator, Blogger, Book author

        https://www.borncity.com/win/

        • This reply was modified 1 week, 4 days ago by gborn.
        • This reply was modified 1 week, 4 days ago by gborn.
        • This reply was modified 1 week, 4 days ago by gborn.
        2 users thanked author for this post.
        Elly, b
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