Luchkow and Thom_d has reported the same problem earlier, but I didn't find a solution for my problem. I have a desktop pc, running Win XP Professional and a laptop running Windows XP Home both are running SP1. When I ping from desktop to laptop or vice-versa, at IP-number I get response, but when I ping with netbios name I get a request timed out. Internet is working on both machines. If I want to connect to a share it's not working with //netbiosname/ but it's working with //172.16.5.10/ I only see the pc working at, in network neighborhood. But I can internet on both pc's. Both pc's are in the same workgroup and I have enabled file&print sharing and netbios over TCP/IP. I have tried it with the laptop connected through wifi and with a cat5 cable directly at the router. None is working. The linksys router has firmware version 2.04.3 (I'm living in The Netherlands-Europe) None of my pc's have a firewall. I'm using the Linksys firewall. I'm thinking of formatting the harddisk and installing Windows XP again. Anyone a suggestion, before Ã will do this?