Hi Bob,

Thanks for the feedback.
Have you tried Device Manager > Network Adapters? Is the wired adapter 
listed?
Select the "wired" adapter, right-click > Properties. (General tab)
What is the Device Status? Any problems listed?
Is it enabled? (under Device usage)
Resources tab.
Any conflicts listed?

Did you try the ipconfig /reset  and ipconfig /renew commands?
Related :How to fix "Cannot renew IP address" in Windows
http://helpdeskgeek.com/networking/how-to-fix-cannot-renew-ip-address-in-windows/

One more thing you can try is to reset the IP stack
How to reset Internet Protocol (TCP/IP)
http://support.microsoft.com/kb/299357
Subsequently go through the network settings - Internet Protocol (TCP/IP ) 
again to confirm.

If nothing of the above works ,it may well point to a defective NIC 
component.

Peter E.

--------------------------------------------------
From: "lswpubrw"
Sent: Wednesday, 03 August, 2011 10:47 AM
To: <[log in to unmask]>
Subject: Re: [PCBUILD] LAN problem

Peter,
I've gone through the list and made all the recommended changes or found
them set as you suggest with no fix.  I have a laptop of my own and tried
that.  Using ipconfig, I can see my laptop returns an IP address for both
the NIC and the WiFi  which are consistent with my desktop IP address,
192.168.1.142 or similar.

The malfunctioning laptop shows a similar address for the WiFi, but a
169.###.###.### address presumably because it can't get an address from the
DHCP.   I'm thinking the problem is hardware in the NIC at this point.  If
so I'll have to set her up with the wireless connection.

Bob

 

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