msiecfg.exe is a Trojan.Bdoor-JU. msiecfg.exe opens a back door. Related files: %System%\msiecfg.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill msiecfg.exe process and remove msiecfg.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.