Re: N7 HQ server unavailable
That sounds like a connection issue.
Restart your router.
If that not helps, shut down your Windows firewall and disable the real-time scanner of your antivirus software. (just for testing purpose, don't forget to activate the firewall and the antivirus software later on.)
If that not helps here is a EA connection troubleshooting guide.
Do you or someone in your household have a smartphone or a tablet, so that you can try to connect on a different device?