Several of us couldn't install the game due to an error message starting with "Entry Point Not Found"
In my case, the computer is abou 18 months old. I suspected that the DVD drive wasn't properly reading the files on the COH DVD. I updated the firmware of my DVD drive and DVD R/W drives. Even so, my DVD R/W couldn't read the COH disk properly. But the DVD disk did read it. To be sure, I copied *all* the files to my hard drive and then loaded the game from there as recommended by Relic in a thread.