Thanks to lindsaar.net for sharing.
I had a Windows XP system (service pack 2) that would only return “Windows IP configuration” and then nothing, no indication of network disconnection nothing, well, there’s a good fix for it.
The system wouldn’t pickup an IP address from DHCP, it was like it was just confused.
You can do the following at a CMD prompt to reset the network configurations:
Note: The first one will ask you to reboot, don’t. Do both commands and then reboot your system.
C:\> netsh winsock reset catalog C:\> netsh int ip reset reset.log
The first line resets all the WINSOCK entries to their defaults, the second line resets all the TCP/IP entries to their defaults.
Once I did this, the computer got it’s DHCP address again quite happily.