AvKill.exe is a Trojan.Killav-AN. AvKill.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\AvKill.exe. More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill AvKill.exe process and remove AvKill.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.