iexplore.exe is a mass-mailing worm W32.Mytob.ET@mm. iexplore.exe tries to terminate antiviral programs installed on a user computer. iexplore.exe opens a back door on TCP port 3030. Related files: %System%\iexplore.exe Adds the value: "WINDOWS SYSTEM CLEANER" = "\iexplore.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill iexplore.exe process and remove iexplore.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.