Mssck.exe is a mass-mailing worm W32.Mytob.IE@mm . Mssck.exe opens a back door on TCP port 1863. Mssck.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\mssck.exe Adds the value: "Mircosoft Sockets SP2" = "mssck.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill mssck.exe process and remove mssck.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.