Broadband Tech > Security > Wireless Security > HOME appears on my network connected via wireless.

HOME appears on my network connected via wireless.

I'd do a packet trace on the third machine and look at the DHCP negotiation (in Wireshark, the filter is "bootp"). Windows likes to try and request the address it was previously using, but in failing that, I noticed on some occasions any attempt at a new address won't "stick." If you haven't already done so, do an:

ipconfig /release

followed by:

ipconfig /all

(assuming this client is Windows). On the other hand, I've also seen instances where someone else took the leftover address because they had statically configured it on their client and when another client tried to get this address, once it does a gratuitous ARP it finds that another machine on the network has an identical address. This is followed by a DHCP decline from the requesting client. Something else to look for in the trace.