doublehell:urban: Playing? far from it!
What I should probably do is bring my desktop to a mates place who is on another ISP and see if I can authenticate my install.
I just can't understand why it would not authenticate at my end at all. Hardware firewall turned off, Software firewall off, Comodo off, even changed the port settings etc and still no luck.
If you've got BF3 and that authenticated fine, I don't see what ME3 would have a problem...
Plus I don't think it's connection related either. My guess is that you've got a bad CD key?
Tried to authenticate on another broadband connection, and the same problem persists.
I've been trying to get them to give me a cd key for a direct download from origin, but to no avail yet.