I have Red Alert 3 on steam and have windows 10.
I have no issues logging into my account.
When I try to join an online match with my bro, it says the following and refuses to load the match.
"Connections are in progress, or connection problem detected. Please wait for the connection to finish, or kick the player who has the connection problem. Connection in progress: 1 - 2."
When I run the test connection program given in the forums, I receive this output.
===================
SUCCESS
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Received 3 pings from nntest.cnc-online.net:40000.
NAT negotiation works with your router and connection.
==> You do not have to use port forwarding.