Browser not reconizing wirless network.

Try Firefox and see if the problem persists. It will help you narrow down potential causes..
www.mozilla.org/products/firefox/

:-)

I installed firefox several hours ago and still having problem.

Have you configured the connection settings IDENTICALLY to the other machines? Is TCP/IP properly installed?

:-)

I may have found something. When I do a 'repair' on my wireless connection, I get 'failed renewing the ip address'. How do I handle this error?

Does your router assign IP dynamically? Your PC should be configured accordingly..
See here
https://www.experts-exchange.com/questions/20892901/Unable-to-renew-ip-address-in-XP-Home.html

:-)

"I get 'failed renewing the ip address'."

Check your wireless network card settings:

- Channel
- Encryption Key (Web)

Re-enter if necessary.

I was actually more thinking off the default connection setting in your browser self. Check if its by accidant set to some dial up connection or something.

Check the following
If you're using WPA encryption, update the clients network card drivers to the latest version, this should enable WPA encryption
Also if you're using Access list security, make sure the mac address of the client (ipconfig /all) is entered into the router

First some info: What OS are you running on your machines? (Same on the ones that connect and the one that doesn't?)
Do you have a firewall on the non-connecting machine?
Antivirus?

Assuming XP is your OS
Go to start>run- type in CMD. You get the command window. Type in IPCONFIG/ALL.

1) Note whether there is a yes or no next to DHCP ENABLED.
2) If so, where is the address coming from.
3) If no, write down your info such as IP ADDRESS, SUBNET MASK, DEFAULT GATEWAY, DNS in case we need it later.

Find the address next to default gateway. Type PING followed by the gateway address. If you get replies that will take us in one direction. If not - post your info from #3 above.

Happy hunting.

Thanks for all the suggestions. This is on my home network, so I'll try it tonight. On the machine, which is not working I am running XP sp1. The network is Netgear. I have disabled the firewall and anti virus software. The two machines that are working are XP sp2. I canot easily patch the machine not working without the internet connection. The brouser is the latest Mozila(firefox).

I ran "ipconfig /all" and compared my results with another working  machine and found differences. I ran ipconfig later and found all configuration are now populated. The only thing I can think of is I added this terminal into the broadcast list and bounced the router. It is now working. The ipconfig told me there was a problem, so I must award points to this person, even though I had many good responses. Thanks to all responders.

Thanx.  "andreba" was on the right track but maybe not detailed enough for someone not a familiar with TCP/IP settings.

Thanks for all to everyone. I can't exactly say what was done to correct the problem, it is noe working. I probably will have another issue related to not being able to secure with a WEP password, but will address this over the weekend.

Thanks