I have a situation w/2 computers on a router/switch. Both XP, 1 home, 1 pro. As of Oct, it was possible to connect to each other and map drives, shares, etc. Sometime in the interim, that capability was lost. The XP workstation cannot ping the Home station. However, the home pc can ping the pro pc. And it sees the share/printers. The home pc is entered in the hosts file previously. Any thoughts?:4-dontkno