Connected but no internet

del everything in %temp%, if you are using internet explorer, reset it back to factory by..in IE7 select,tools,internet options,go to advanced tab and click reset. Be advised, Vista is notoriously difficult when it comes to internet connection problems especially wireless.
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I am not sure how you reset that router, but normally on the back of that router will be a very small hole, get a pin and push into the hole and that should reset the router to default settings (As New) and reboot the pc. Once the pc has rebooted go to start>Control panel>Network Connetions & then make sure that the connection is enabled or click repair & this will help you get a new IP address. 

Best of luck !!