well it looks like your doing this in windows...hence the need for cygwin. but, you might have missed that in the previous post about ettercap, while the persons question was about unarchiving the file, your answer still lies within the topic. i posted a link to ettercap for windows. all you have to do is untar it, and it should have the ettercap.exe file right there.//
Unbodied unsouled unheard unseen
Let the gift be grown in the time to call our own
Truth is natural like a wind that blows
Follow the direction no matter where it goes
Let the truth blow like a hurricane through me