Unfortunately the flag doesn't show up if not registered so the website link will not help.
The image is hosted on the same side, this is the html code:
Let me know if something else is needed to debug it.
Since that LAN settings option helped you some, you can also try some other network tweaks. Disable Windows TCP/IP auto-tuning. http://www.speedguide.net/faq/how-to-disable-windows-vista-tcpip-auto-tuning-247
You can also disable IPv6 on your network card, if you are not using IPv6. http://www.informationweek.com/how-to-disable-ipv6-on-windows-7-/d/d-id/1099490?
Those are two options that might help with some network related issues.
Both didn't changed anything.