Are you running with any security on the wireless? If so disable it and see if it will connect?
Temporarily disable your firewall/av and see if it will connect that way
Boot the computer to "Safemode with network support" and see if it will connect there.
I have tried all, NO FIREWALL, NO ROUTER SECURITY, NO ANTIVIRUS & SAFEMODE WITH NETWOK SUPPORT.
The problem is same, It detects a network but can't connect.
Starting to think that perhaps the card is bad.
Try running this WinSock XP FIX Just download it to you desktop and run it.
Also check in device manager to make sure that the adapter is showing correctly and with no errors next to is.
Remove and reinstall your wireless drivers. Make sure you router has the latest firmware.
After that would suggest a new wireless card.
If it can see the wireless network, it is almost always a configuration problem (though it is occasionally a hardware problem with the card).
Is MAC address filtering enabled on the router you are trying to connect to? If it is then you will need to add the MAC address of your wireless card to the list of allowed adapters.
I have tried reinstalling windows and all drivers. Actually its an Intel Centrino Machine with 2100 Network Connection Wireless Card.
I have tried drivers from Dell & Intel itself, have tried many configurations but of no USE. Then have read an article that sometime its due to Accesspoint or router (compatibility issue), so now I am trying to find a USB wireless Lan or a router to prove the theory.
Anyway thank you all for the help and if you find any info on this problem please let me know. The wireless router I am using is Zyxel, and my own HP Pavilion is working fine with it.
I'm having a somewhat similar problem with my D600. It has a Dell TrueMobile 1400 Dualband WLAN card and was working fine until I got a virus. I had to reformat the hard drive and reinstall Windows XP and all the drivers. I now get very inconsistent performance. Sometimes it connects just fine and other times not at all. Right now it is sitting next to the wireless router and saying low signal level, status unknown. Now, a few minutes later, it's fine with good signal strength. I'm pretty confident I have the right drivers installed so I don't kow where else to look.
when you reloaded the drivers did you follow this sequence of reloading them
When you look in Device manager are any devices shown with either a ! or X next to them