Have 3 computers on network. All Peer to Peer One serves as the server 2 "clients" (PC1 and PC2) have the EXACT same settings on their NICs (except for different static IPs) Both are getting their static IP's from the router. PC1 cannot ping the server or the PC2, the PC2 Can ping the server, but not PC1....BOTH can ping themselves. I did try disabling the firewall on PC1...but still could not ping. I'm completely befuddled. Has anyone else had this issue before? Thanks > PLEASE HELP OTHERS - Report back what did/didn't work for those referencing this thread.<

So...PC1 can't reach anything, right? What's the IP on it? It's in the same subnet as PC2? After running ping, do you get an ARP reply? (Do "arp -a") - is the correct MAC address listed for PC2 (not 00-00-00-00-00-00) ? If you don't get an ARP reply then it's not an IP issue - check your switch, cabling, NIC / drivers, maybe hard set both sides of the link to 10mb/full instead of 100.