Apitsk32.exe is a mass-mailing worm W32.Mytob.HI@mm. Apitsk32.exe opens a back door on TCP port 8076. Apitsk32.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\apitsk32.exe Adds the value: "Windows API Control Task" = "apitsk32.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill apitsk32.exe process and remove apitsk32.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.