Hacker.exe is a Trojan.PcClient-V. Hacker.exe opens a back door. Related files: %System%\Hacker.exe %System%\Hacker.asf %System%\Hacker.dfg More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill Hacker.exe process and remove Hacker.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.