system
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Here is a question - I believe that in the settings, Avast allows you to exclude files from scanning. If you do this, do those exclusions carry over into a boot-time scan? I ask because, if they do, perhaps a Windows guru could suggest an exclusion to try (I suppose yesterday’s sfloppy.sys would be one candidate). I may try disabling an active shield or the sandbox prior to a boot-time scan (about a four times per year event) and see if that makes any difference, but winnowing out the culprit, if there is one, would be a laborious process.
If any readers of this thread who accepted the false positive yesterday wanted to try a boot-time scan to see if it knocks out their wireless, and then post the results here, that would be useful, but then you have to get it back, so I can see why people wouldn’t want to do that.