Sony VGN-S150 VAIO User Guide (primary manual) User Manual page 172

Why can't I access the Internet?

Check the access point settings. Refer to the instructions supplied with the access point.
 Make sure your computer and the access point are connected to one another.
 Move your computer away from obstructions or closer to any access point you may be using.
 Make sure your computer is properly configured for Internet access.
Page 172