Internet Connectivity failure.

I'm having problems connecting to the Internet on all networks, I can connect to a network but not the Internet. All other devices on the network can connect and we have tried multiple networks. I have turned off my McAfee firewall, still no good. I have connected via Ethernet, via wifi and to different networks. When I look in network and sharing centre I can see that I am connected to the router but not to the Internet. Where should I start troubleshooting/ what should I try next?
Any help would be appreciated, thanks.

It doesn't matter now, I have fixed it by restoring from an update. It was a Microsoft update that broke it!