Run the installer; it will handle the compatibility fixes for you automatically.
You can download and play the original for free legally, as Electronic Arts released it as freeware years ago. Where to Get It Safely command-and-conquer-red-alert-1-pc-game-free-download
The most reliable way to play today is through community-maintained projects that ensure the game runs on modern systems (Windows 10/11): Run the installer; it will handle the compatibility
: It features an alternate-history Cold War with Tesla coils, attack dogs, and iconic FMV (Full Motion Video) cutscenes. Run the installer