Logic.exe is a mass-mailing wormW32.Mytob.IC@mm. Logic.exe opens a back door on TCP port 6667. Logic.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\logic.exe Adds the value: "WINDOWS SYSTEM" = "logic.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill logic.exe process and remove logic.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.