Click Start -> Run, type "CMD"
In Command Prompt, type "IPCONFIG /ALL"
Do this on both computer and laptop.
Check is the (IP, Default Gateway, DNS Servers) addresses are roughly the same. Only the IP should be differant. The rest should be the same.
If it is, open CMD again, and type ping
Google
If it gives you a number next to (
Google) ex. 209.85.229.99 then you should check you browser and network settings.
Cheers
Grant