b0ff.exe is a Trojan W32.Protorid-AF. b0ff.exe opens a back door on IRC channels. b0ff.exe spreads via open network shares. Related files: %System%\b0ff.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill b0ff.exe process and remove b0ff.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.