First off I’d like to say this is not really a Windows 7 error. The cause of this is issue is normally caused by installing something like an old Shrewsoft VPN or Cisco VPN clients. These clients tend to install “virtual network adapters” and they can reek havoc on the network settings on your machine.
You will have to open up a command prompt and run it as administrator. The easiest way to do this is to go to the Start ORB – type “cmd” and then right click the “cmd” application and select “run as administrator”.
Once you open the command prompt as administrator there is a windows command that you can run:
netsh int ip reset location-of-log-file.txt
See what the output looks like:
If you still have the computer set to a manual IP address go back and tell it to use DHCP.
Restart your computer. (I didn’t have to reset mine but the netsh command recommends that you do)