I am in Australia and have been experiencing the exact same issue with NA servers only - in particular Behemoth. I can successfully log on to all other servers and am running windows 10 NOT connected to Steam and have a similar set up to Ra_lord, NO changes have been done to my system, I am able to connect to NA for other applications through work so it is clearly an issue at your end as I am able to successfully log onto other servers in other regions and play.