sounds like your wireless card, might be worth doing the driver thingy
If it's connecting to the router fine but not the internet then it can't be a driver issue.
That could be a software issue provided by the manufacturer but if the laptop can see the router and actively try to connect, I'd say the driver was working okay.Yes it can. If a router uses WPA2 and the laptop doesn't, then it will see the router and try to connect but may fail at the obtaining IP address stage, or will just say limited but no connectivity as it hasn't managed to negotiate the connection correctly.
That could be a software issue provided by the manufacturer but if the laptop can see the router and actively try to connect, I'd say the driver was working okay.
A "driver update" could fix the problem because they're usually coupled with the software to manage the wireless connections.
But anyway, change the router from "WPA2" to "WPA/WPA2 mixed".
Or if you're not too bothered about security, change the security to WEP