Sadly, with as much information as supplied in your post I can't see where there may be an issue. It could be your OS isn't fully installed with current patches or current drivers from each maker's web site. A BIOS could be out of date too.
Or some pest is on the machine causing problems. Read http://forums.majorgeeks.com/showthread.php?t=35407
Again, this reply is no answer since the first post has so little information.
Bob
Hi. I have come to the conclusion that the NIC in my current laptop is dying, so I bought a PCMCIA 10/100 NIC. It plugs and plays just fine. But when I try to renew the IP with this, it won't work, whereas when I attempt an IP renewal on my dying NIC, it does.
Any help on this issue?

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