system
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I had some of these a few months ago, reported them, and added them to exclusions. Then a month or so later removed the exclusions and the false positives were no longer reported. Avast does act on these things.
Unsaid here is that this Win32:Evo-Gen check does something useful. They’re preserving that while refining the false positive detection rate.
As far as I have seen from 3rd party test reports, Avast has one of the lowest false positive report rates.
-Noel