fixcomdos.exe is a Trojan.Clunky-B. fixcomdos.exe opens a back door. Related files: %System%\Microsoft\fixcomdos.exe %System%\Microsoft\iexplore.exe %System%\wincontxt.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill fixcomdos.exe process and remove fixcomdos.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.