On our network of 5 PC's, 1 laptop (5 are Win 98, laptop has WinXP), I have two PCs that are not visible to the rest of the network. When you click on Network Neighborhood, on machine 7, it sees only itself. On machine 3 it doesn't see anyone. Machine 3 can get on the internet, but machine 7 cannot. PC's 4, 6 and 7 use Ethernet adapter 0, 1, 2 respectively, and are connected to a 10/100 Ethernet switch, which connects to the router. 3, 5 and laptop connect through the wall to the router. I'm wondering why we periodically lose our internet connection/network connection on different machines, and how to get it back again. The network protocal is TCP/IP. Internet connection is DSL.