Hi Kent: I just went through the install log and it clearly shows the EAC being installed in the same drive as the game. However, I likewise found EAC in my C drive, as I mentioned. If I do a repair on EAC what it does is uninstall it and then reinstall in on the C drive without any prompt as to what drive you want to use. So when I launch the game and the EAC prompt comes up it clearly shows it is starting EAC from my D drive. But then the game never launches. But if I uninstall EAC from my C drive and launch the game it comes up with that error message saying that EAC is not installed. So the launch is looking for EAC in the wrong drive, yes?
Maybe a reinstall of the game from scratch is needed and see what happens.