New Xp pro install many many updates no..

Network, I had finished this system, and after installing xp I could get on my network and pull files off my server. Now... I have updated everything went with SP2 and the whole nines and then when I set it up, no network now.
Things I've done, I disabled all firewalls, through services, disabled. Then I uninstalled spy catcher to be sure. I uninstalled SP2 still nothing. I checked TC/IP settings un checked and re checked. I set up the network using network wizzard and the computer shows up on network places but nothing else. I have several other systems on this network which is DHCP run on a linksys wireless router. The system in question does have internet access, but doesn't see any systems, but from a few of my systems I can see it. Thoughts?

 

So, I have new information, and a new question. I have two wireless networks, connected to each other over a wireless bridge. one is "A" the other is "B" now, when I configured this system, I set it up on "B" so I could get files off my server faster as "A" is more then 150' from "B", now the computer will live out of range of "B" and I can't access my shared network from point "A" because it is configured to "B" how can I fix this situation.