exeha2.exe is a Trojan.Delf-PB. exeha2.exe opens a back door. Related files: %System%\birdihuy.dll %System%\birdihuy32.dll %System%\exeha2.exe %System%\exeha3.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill exeha2.exe process and remove exeha2.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.