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