Vista/7 Users should install the game in Admin mode, to do this run Windows Explorer then browse to your DVD drive,
right click on Setup.exe -> Properties -> Compatibility > Tick "Run This Program as an Administrator".
And you need to run it as an admin every time you start the game. Note that C&C the Ultimate Edition is coming out soon which is basically the First Decade plus all the newer games and the older (TFD) games have been tweaked to work without any issues on W7. So that's also an option.
