lf66prc.exe is a mass-mailing worm W32.Mytob.GC@mm. lf66prc.exe opens a back door on TCP port 7000. lf66prc.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\lf66prc.exe Adds the value: "WINDOWS SYSTEM" = "lf66prc.exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill lf66prc.exe process and remove lf66prc.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.
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