I was trying to get one of my old box (PIII with Windows XP) into the internet. I can ping 127.0.0.1, result shows good. The is no problem on the NIC. I also went to device manager and checked it, it says device is working properly.

I have another computer of the same configuration and system. It connects to the internet or intranet (as a client). But the one, above mentioned does not connect. I have then, formatted it and reinstall XP, still does not connect.

1. Device manager shows nothing problem on NIC
2. Loopback successfully return.
3. There is no problem from ISP.
4. Formatted and reinstalled OS.

Then where is the problem ?