I've been using my sony vaio (with vista)on a shared network at home for about a year without issue. All of a sudden it won't access the network at all. It sees the network which is usually at full strength, but when I click connect, and after a brief pause I get the message "cannot connect to network". I can connect to the network wirelessly from another pc but not with the laptop. Obviously something has changed but I'm at a loss to understand what or why.
If I was you, go into router setup page and create a new encription for wireless, then put that into your Wireless Laptop Network Settings. Before you leave setup page make note of the SSID you may need that also
Unistalled and reinstalled network adapter - no joy.
I'm now thinking there may be an issue with the router's wireless settings as I tried wireless access with another laptop and that too couldn't connect whilst being able to do so via ethernet cable. Router is a Linksys WAG200G. Have had this for around 2 years and has been flawless up until now.