Note: Some antivirus software (Windows Defender) will quarantine trainers immediately. You must add the trainer folder to the "Exclusions" list in Windows Security before extracting the file.
Assuming you have a clean installation of Command & Conquer: Red Alert 3 patched to 1.12, follow these steps: red alert 3 1.12 trainer
Game crashes on hotkey:
Trainer triggers antivirus: