Alright, so I downloaded C&Cnet 5 and copied it into each game's folder before running it (I assume it won't work for Renegade or Red Alert 2 yet? I'm using The First Decade).
In the games I did run it in (Tiberian Dawn, Tiberian Sun, and Red Alert 1), it brought me to an online server. However, on Tiberian Dawn I can't get into the Internet using the game itself, nor on Red Alert.
Tiberian Sun and Firestorm just freeze on the menus and can't work at all.
Can you please help? I'm on Windows 8.1 and am running these games in Windows XP compatibility as administrator from The First Decade.