Lets try updating your drivers....
If you can right click on the properties of your NIC card in your device manager. Check the true model of your NIC card.
Just go here and download the latest driver... check again.. http://www.realtek.com.tw/products/p...Level=4&Conn=3
Also, Uncheck your TCPv6 adapter as well if your not using Home Group.
We just need to narrow down the problem so we are just going to try a few other things
If you could as well... lets put static IPs on your TCPv4:
I would try different DNS Numbers:
by default on your router it gives you: 10.0.0.138
OpenDNS provides the following recursive nameserver addresses for public use, mapped to the nearest operational server location by anycast routing: