ffservice.exe is a Trojan.Dloader-XM. ffservice.exe downloads code from the internet. Related files: %System%\ffservice.exe %System%\lservice.exe %System%\wservice.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill ffservice.exe process and remove ffservice.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.