I have the Origin version from The Ultimate Collection. This will prevent Origin from overwriting any manual edits to the game. I have the Origin version bought separately.
If you are not using Windows XP, browse to the directory you installed the game to and set ra3ep1.exe to always run as administrator.Install the game as you normally would.If you are not using Windows XP, exit the autorun and run EASetup.exe from the disc as administrator.
See this guide for more information on what this means. I have an older digital download version (download case, ex-EA Store, Direct2Drive…). This guide will show you how to install Command & Conquer: Red Alert 3: Uprising on modern operating systems, with different sections covering different releases of the game.