I have a home network which I just use so all computers can access the internet. One computer seems to not work tho. It says that the network cable is not connected. It is connected, and I checked the IP addresses, SNM, Gateway, DNS, etc. and it still does not work. The lights come on the router showing that it is physically connected. Is there any other reason why XP might think that there is no network cable connected?

Windows XP firewall?

Regardless of the link lights, switch the cables with known, good cables. If you have a cable tester, use it to check continuity and proper wiring sequence for your cables. Other than that, I would verify that your PC is actually getting a good IP address from your DHCP server/router. HTH

Don't bother with the hardware it's not the problem. If it was then lights would let you know. It IS a setting. It recently happened to me, however, I can't exactly remember how it was fixed. If you know of anyone who can look at it I would have them take a look. I am 100% sure it is a setting.

Yes, I believe it is a setting too, because I had this problem before and it sort of went away on its own, i might have done something, but i did not replace any hardware, but it went away and im not sure why at all.c

1. Disable the XP firewall. That's the #1 cause of connectivity problems in a LAN: it's not set up right. 2. From the command prompt ping 127.0.0.1. If you get OKs back your network adapter is probably OK and configured properly. 3. Ping your router's gateway address (usually 192.168.0.1 or 192.168.1.1). If you can't get OKs back the cable may be loose in back or it's a bad cable. Adjust or replace as necessary. 4. If there's another adapter or a wireless adapter remove/disable these. Could be trying to connect through the wrong adapter.