Tech support had me change my User Account Control (UAC) .... It actually took me down to just the base game. Origin did not recognize anything but the base game after this change. If support had you do this you should get them on the phone demand them to guide you through the compatibility test. You will need to do a clean install of both Origin and TS4. There are free registry cleaners you can get after you uninstall everything. Run the program to totally remove everything. I did save my important folders to another location but every time I try to use an old save I get the message about incomplete data. I can't use my old tray folder either.