Cause this isn’t the first time that I see a false positive for an Acer BIOS updater, maybe you should download and check every BIOS updater from Acer instead of whitelisting single updaters for single PC models when somebody reports them (just my 2 cents).
This is to inform you that false-positive has been fixed.
You can update to AV database Version <10886> of Comodo Internet Security Version<5.8.213334.2131> and confirm it.