How are you sure that your connection to the router is working. Have you changed the cable just to check.
Left click on the Network connection icon in the Task Are (bottom right) then click on Open network and sharing centre.
Click on the network name and see if you are connected to the network.
Have you set a working DNS in Internet Protocol ipv4 in the Properties. Try 220.127.116.11 and 18.104.22.168 as this is Googles DNS server.