You may try to reset wireless. Or this post may help.

After installing SP3 XP loses Internet connection
http://www.chicagotech.net/netforums...hp?p=7648#7648

--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"Gregg Hill" wrote in
message news:OpgV35BBJHA.820@TK2MSFTNGP04.phx.gbl...
> Hello!
>
> I am helping someone remotely and typing this as I attempt to fix the
> problem.
>
> I have a user with a Dell Inspiron 8600 laptop that has a bizarre problem
> with its integrated Intel 2200BG wireless connection. When hard-wired, the
> laptop works fine. When connected via wireless, it cannot browse the web,
> but it can ping by IP and by domain name.
>
> It has XP Pro SP3 with all current updates, the driver is the latest from
> Dell, and I tried the latest one from Intel. It connects to a Netgear
> WGR614 wireless router with its latest firmware.
>
> I have a strong signal and either letting Windows manage the connection or
> using the Intel ProSet management app results in the same behavior. What
> is so odd is that ping by name or IP works (network layer?) but browsing
> does not, which is at the application layer. I can Telnet to a mail server
> on port 143 (telnet is app layer). Uh, oh, here is an update. It actually
> just loaded Google, but only several minutes after opening IE7 (same
> result with Firefox). It is EXTREMELY slow. I have a remote control
> application that normally takes a few seconds to reconnect if the computer
> is rebooted (it does reconnect quickly to me when hard-wired) but it takes
> over 10 minutes to reconnect via her wireless connection.
>
> What could be causing such extremely slow wireless behavior? If we plug in
> a cable, it is blazing fast. I have reset the TCP stack as well as Winsock
> to no avail.
>
> Any gurus with ideas?
>
> Thank you!
>
> Gregg Hill
>