- Archived
Firefox virus warning is triggered by old mitigated Windows Defender detection history
Having the exact same issue as [this one] and [this one]. In Firefox, a virus warning is persistently being triggered by an old threat that was mitigated (deleted) long… (read more)
Having the exact same issue as [this one] and [this one].
In Firefox, a virus warning is persistently being triggered by an old threat that was mitigated (deleted) long ago, but is still showing up in [Windows Defender Detection History].
I believe the problem would be solved if Firefox would ignore the detection history, for threats that have been mitigated.
One option would be to turn Firefox warnings off altogether, and leave everything to Windows Defender. I don't want to do that just yet.
I did try to clear that history, to no avail. Here's what I tried.
- [Clearing the event log] - [a support tip from Microsoft] - Is there some process holding on to that directory? ProcessExplorer nor Resource Manager find it, not by DetectionHistory nor by its handle, as per [this post] and [this one] - Navigating in Windows Explorer, I can't get any further than "C:\ProgramData\Microsoft\Windows Defender\scans". That is, I can't get to "C:\ProgramData\Microsoft\Windows Defender\Scans\History\Service\DetectionHistoryhistory". - Trying [these tips] did not help either. Even when I'm user `nt authority\system` who owns that history file, I can't delete it. Access denied always. Running `chkdsk` with the `/sdcleanup` option did remove other, empty subdirectories in `...\DetectionHistory`, but not `.\13\68295B79-72DC-433F-88C7-42E23422F5D8`. - [this] limits the time to keep the detection history. I set it to 1 day, checked two days later, it was still there.
I'm on Windows 10 Pro v 22H2 build 19045.3324, with Firefox version 116.0.2 (64-bits).
Screenshot of warning and detection history attached.
(edited to fix the links - do not use the '|' but use a space) - c