An update for Command and Conquer: Red Alert 3 was released today. It will be applied automatically when your Steam client is restarted.
This game was delivered with both Sony SecuROM and Steam digital rights management technology. This patch will remove the SecuROM technology from the game as well as remove the game-specific SecuROM license from your machine. The game will continue to be protected by Steam technology.
To remove SecuROM files from your machine and for more information, see the EA support site here.