>>>Avast anti-virus software finds a virus called Win32:Rbot-FVC in my VFP 9.0 executable while Norton and AVG don’t locate any viruses. Avast doesn’t find the virus in the development version, only in the run-time version. It would be nice to find that Avast is generating a false finding. Has anyone experienced a similar situation?
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>>Recently Avast made a false positive on Refox. Grisoft was contacted and they made a patch to fix the problem.
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>What would Grisoft (AVG) have to do with Avast?

Mixed up in the virus checkers. But on the otherhand knowing that you can contact the manufacturer to advise them of the problem, and they actually fix it, makes things easier.