So digging further, Apache.exe is in the correct location, but when I try to execute from a command prompt it I get the error that the system cannot execute the specified file. Looking from cygwin command prompt, the file was executable. Maybe it's been corrupted, or doesn't work on Windows XP? $ ls -l Apache.exe -rwxr-xr-x 1 LCURRENS ???????? 18432 May 24 04:48 Apache.exe