LAN Does Not Have A Valid IP Configuration-Windows 7

LAN does not have a valid IP configuration

Dell Optiplex 380 with Windows 7 OS & Broadcom Netlink Gigabit 57780 Ethernet Chipset

• Click on the Start button at the bottom left corner.
• In the Search Box, type Device Manager and press Enter to open the Device Manager window.
• Click on Network Adapters.
• Make sure that the Broadcom Netlink Gigabit Ethernet Adapter is working properly.  If the adapter is not working properly, you may see a yellow icon with a question mark.

• Go to the Start button again.
• In the Search Box, type View Network Connections and press Enter to open the Local Area Connection (LAN).
• Right Click on the Local Area Connection icon and click on Properties to open the Local Area Network Properties window.
• Click on Configure button to open Broadcom Netlink Ethernet Properties window.
• Click on the Driver tab.
• Note that the Broadcom Netlink Adapter Driver hasVersion 12.1.1.1 dated 6/20/2009.  This driver should be updated.
• Click on Driver Details.  Note that the driver, k57nd60x.sys, is located at at C:\Windows\system32\DRIVERS\k57nd60x.sys
• Go to Broad Ethernet NIC Driver Downloads and find the network driver for Windows 7 operating system.
• Download the network driver zip file to your computer.
• Unzip the downloaded file.
• Find the newer k57nd60x.sys driver, Version 14.1.0 dated 12/10/2009 from the downloaded files.
• Copy the driver file and paste it in the directory C:\Windows\system32\DRIVERS.
  
• Restart the computer.
• Restart the modem by turning the power off and then on after 15 seconds.

Voila, you should be able to the connect to the internet now.  The dudes at Dell technical support informed me that I have to reinstall the operating system to ensure that there is no software conflict

I hope this fix worked for you and you avoid paying a computer company for software troubleshooting.  Cheers.