LAN and wireless connection problem

Hello,

I have a laptop that connects perfectly to the internet when directly plugged into the router, however it will not connect either wirelessly or to the LAN.

The router is correctly set to issue both IP addresses and DNS details automatically and the laptop is set to DHCP and to have the IP issued automatically.

When connected to the LAN (and wireless) ipconfig shows all the details correctly - but it won't connect to the internet.

I have updated the laptops' card drivers, I have power cycled the router. I have run netsh and winsock repair utilities.... I can't think what else to check! Any help would be very welcome.