Vista/Win7 Network Connection Problems

You’ll discover both IPv6 and IPv4 enabled. Go ahead and uncheck the box for IPv6 and click “OK.” You’ll need to reboot your computer, but afterwards if the protocol incompatibility was your problem (and it very likely was), you’ll find that your computer can now communicate fine with the router. Maybe. There is one other complication Microsoft introduced into Vista just to encourage you that much more to upgrade your router – it’s something called “autotuning,” and it’s also the next Vista tweak. (click the link for more)

Top 5 Vista Tweaks To Increase Internet Speed

Comments:

If you have no internet DHCP may not be activated - read this.

Vista and Win7 both have trouble connecting properly to some wireless routers. This is hugely irritating when it happens. I have not proved these work but the IPv6 suggestion is common. The "autotuning" suggestion is new to me. Both are worth a try but you will need to document them locally as you will not have a connection - da!

On a fresh install of Windows it can take time for the network to establish connections. So give it time before taking a hammer to it. But this strong connection to wireless but no internet can be a maddening issue that time will not help.

If this is your home router, update firmware, update NIC drivers, soft and hard reset.
Try ping www.google.com and 203.2.75.12 (If you can ping one but not the other it's a DNS problem)
Here is a good basic network post.
This is standard stuff.

Netgear 192.168.0.1
D-Link 192.168.0.1
Linksys 192.168.1.1
Belkin 192.168.2.1