Network adapters not getting DHCP address on either wired or wireless "Limited Connectivity"

TCP/IP stack repair options for use with Windows XP with SP2/SP3.
Go to Start, Run, CMD to open a command prompt:
In the command prompt window that opens, type type the following commands:
Note: Type only the text in bold for the following commands. 

Reset TCP/IP stack to installation defaults, type: netsh int ip reset reset.log
Reset WINSOCK entries to installation defaults, type: netsh winsock reset catalog
Reboot the machine.
Next, boot in Safe Mode with Networking and connect with a wired connection to your router. Please use a cable and port that have worked for another machine.