msbitsec.exe is a Trojan W32.Sdbot-AJS. msbitsec.exe opens a back door on IRC channels. Related files: %System%\msbitsec.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill msbitsec.exe process and remove msbitsec.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.