In 2009, Eugene Kaspersky, co-founder of one of the world’s top security companies, told some of his lieutenants that they should attack rival antivirus software maker AVG Technologies N.V. (AVG.N) by “rubbing them out in the outhouse,” one of several previously undisclosed emails shows. Former employees say that the reprisal Kaspersky was pushing for was to trick AVG’s antivirus software into producing false positives – that is, misclassifying clean computer files as infected.