My laptop connects to the internet but it says i have no acsess

[Guest]

Hello,
i have a Toshiba with windows 7. Every time i connect to a network it says i am connected but i have no internet access. My girlfriends computer, the one i'm using right now, works fine on the network. Does anyone know what the problem might be?

 

[Guest]

Check TCP/IP Properties.

Start, Connect To, Connection, Properties, Scroll Down TCP/IP and highlight, click Properties and check that Obtain DNS and IP address automatically are enabled.