You need a good antivirus program to clean up computers if discovered malware becomes widespread.(Like Stuxnet, Flashback Trojan). Since Windows Security Essentials/Defender Windows 8 I don't really think about other anti virus vendors however it is very important that all of them remain active. One antivirus company would be a dream for malware creators. Personally I think severe global penalties for creating malware/'social engineering' or a chip+software breakthrough is needed to change the current situation. Antivirus software has actually become pretty good at cleaning known attacks which is really all you can ask for at this point in the game considering how advanced malware has become.