Is this a new bug with MS Defender?
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(278.4, 28.000000000000004%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EK1%3C/text%3E%3C/svg%3E)
kirbster 1
55
Reputation points
Windows 11 25H2 26200.7922
The last time I used this system was back on 21 Feb 2026 at which time I had ran a Windows Defender Quick Scan. Booted into this system today, weary of yesterdays fiasco, but was able to update...only took over an hour and 20 minutes to do so..
Back to the subject When I went back in today to run a scan the first window was the Previous Scan Results which was showing NEGATIVE numbers. it took -5 hours and -59 minutes to run the last scan?
Has anyone else seen this? I have never seen negative numbers before...
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 24%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPC%3C/text%3E%3C/svg%3E)
Paul Chou 1,406 Reputation points2026-02-26T00:57:04.61+00:00 hi,
That is weird, never seen that before. Plus, quick scan should not take over 1 hour to scan. You can try doing the scan again. You can file a feedback in the feedback hub and I will upvote for you. It can be a bug but I do not know.
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CrazyKats 14,810 Reputation points Volunteer Moderator2026-02-26T01:01:02.0866667+00:00 We shouldn't inflate the Feedback vote if you aren't
on that build or have that issue.
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Paul Chou 1,406 Reputation points
2026-02-26T01:04:24.6666667+00:00 By the way, I did a quick scan and it took 17 seconds. It showed that the scan lasted for 17 seconds.
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kirbster 1 55 Reputation points
2026-02-26T02:08:03.6766667+00:00 After the update I ran another scan, took a screenshot and I'm going to wait a couple of days before I start that computer...just to see if it will replicate itself. I guess -5 hours and -59 minutes in reality is quicker than 17 seconds since it finished nearly 6 hours prior to 17 ? huh? what?
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