Resetting your router I think is your only option don, since we know that the wireless on the laptop is working since it is picking up your other networks. We know the router itself is working since you can pick up a wireless connection from another laptop. This rules out hardware and drivers.
The only possibility I can think of, is that your new installation of XP has confused matters. Since your router retains a DHCP address (leases) for your laptop for some time, so that each time you connect, you end up with that same address. Now you are trying to connect with the same laptop (same MAC address) and but a new OS (different workstation details). Your router may be rejecting your laptop on this basis. Resetting your router will clear these leases, and hopefully give your laptop chance to connect.
|