i think you need to check you IP going to start>run>cmd a black screen will appear. type ipconfig/all and check the IP if there is an ip for as long as it's not 0.0.0.0 or 169.x.x.x your good to go. you can also try to check if the network adapter is working by pinging it in the black screen type ping 127.0.0.1.
Also try to check Browser settings on IE go to a gear icon at the upper right hand side]Tool>internet options> Connections tab>Lan settings button> uncheck everyting and there should be no proxies. I assume you have the TCP/IP settings set to obtain automatically an IP adress to your ISP right? Try to also reset the IE settings under Advanced tab in internet options, hope it will help.