network device uninstalled

hi my network adaptor overnight stopped working and despite my best efforts including reinstalling windows and the motherboard drivers i cant get it working. i dont know if that part of the motherboard has gone faulty or if i am simply not clever enough to work it out ... i built this myself below is what pc wizard told me ... when i plug ethernet in i can connect to the internet but if i use any wi fi card i cant ...
Mainboard : ECS GF8100VM-M5
Chipset : nVidia GeForce 8100
Processor : AMD Phenom X3 8450 @ 2100 MHz
Physical Memory : 3072 MB
Video Card : NVIDIA GeForce 8100 / nForce 720a
Hard Disk : Maxtor (204 GB)
Hard Disk : SAMSUNG (200 GB)
DVD-Rom Drive : _NEC DVD_RW ND-3500AG
Monitor Type : JT178x5 - 17 inches
Network Card : MCP77 Ethernet
Operating System : Microsoft Windows XP Professional 5.01.2600 Service Pack 2
DirectX : Version 9.0c

 

Have you tried uninstalling and reinstalling the software and drivers for your wifi card?

 

Yes I uninstalled and reinstalled the drivers AND installed a new wi fi card and it still won't work
is there anything I should do in bios ?

 

I guess there could be something in the BIOS, but unless you updated or tweaked settings in the BIOS just before you lost WiFi it's unlikely anything has changed there.

I'd think it more likely that something in your router security settings needs to be tweaked. But you don't mention anything about your router, though you do mention connecting via an Ethernet wired connection. Where does that Ethernet connection come from? A router?

Please provide some additional info about your wireless hardware and how you were connecting previously before you lost your connection.

Sometimes you have to loosen up your router security settings a bit, get your computer "recognized" as part of the network and then once again tighten up security via the router settings.

Also, you may have better luck getting additional help if you post in the Networking forum. But if you'll provide some additional info, as requested above, about your previously working wifi connection (i.e. your own router at home or connection at a nearby internet cafe or coffee shop or whatever) I'll see if I can make some additional suggestions.

 

One other thought.... Is it possible that you previously had patched or updated the driver for your wifi card (and your mobo Ethernet driver also) but when you uninstalled/reinstalled the drivers you forgot to patch/update them?