I got the game in DVD about 4-5 years ago and as a standalone game. It wasn't bundled with anything and when I had no problem playing the game online with the same computer(Windows 7) until at least a year ago. I highly doubt it's the firewall problem.
Until now I would at least attempt to log in 3 times and it will show the "Could not Connect to Red Alert 3 Online". Please do help, anyone. Thank you.