It is a matter of connection/firewall/ports or something related, that's for sure. So I started to think about. I don't remember the firewall asking me to add an exception for gw2 at installing so I made them, in and out rule, I have read that CoherentUI_Host.exe has something to be with BLTC and launche so I made an exception in firewall for this 2. I'm not sure if I correctly made the exceptions in win 7 but think so, problem is still.
Does anyone knows which ports uses BLT? so i could try to open that port.