|Once you release the bindings it will say zero. /renew wouldn't run, or it ran unsuccessfully? If unsuccesfully, it sounds like your dhcp client is broken. You can try to repair it, you can go to a static IP instead of using it, or you can do a reinstall of Windows.|
Repair: First, be sure the dhcp client service is running: start/run/cmd/services.msc. It must be set to an automatic start.
Next, try file checker: start/run type SFC.EXE /SCANNOW . You may need a retail XP disk handy.
If that doesn't work, remove and reinstall dhcp directly. See http://technet.microsoft.com/en-us/...
Static IP: very easy. Turn off dhcp on the connection in XP. You may have to go into the router to see what IP range it accepts, but you could try something like 192.168.1.110. Subnet mask: 255.255.255.0. The default gateway is the router's address - probably 192.168.1.1. You can verify that in the router or the other computer.
Reinstall: you can do a full install or a repair install of XP. The repair saves your apps and personal files, but will have to be updated. Full install wipes out everything.