It could be there isn't enough address or your NIC is bad. To test if your NIC is bad or not, record your wife's computer IP then unplug her computer and leave only yours plugged in and reboot it and see if it picks up an address and if this address is the same on your wife's computer. This would indicate there is only 1 address to go around and that your NIC is in good shape. If not, might be a bad NIC.
Symptoms for 0.0.0.0, please refer to this link for additional troubleshooting
"Ipconfig" command reports IP address 0.0.0.0