Ok, weird problem. In an effort to make my computer run faster I overclocked the processor from 2.83 to 3.6 and the game would not run. I reset the CPU to the original and tried to run the game again. Same error ACU.exe would not run. I figured I'd reinstall the game and after reinstalling it, uplay on starting it tells me the game files are missing. I checked the Ubisoft folder and sure enough unity is not there. on uplay it shows up with a download button. Has anyone else ever run it to this sort of thing and more importantly what files and registry items do I need to make sure are deleted before attempting another reinstall?