Recently, 2 of the 4 computers went missing from the Network places. I can run ipconfig, and they show all the correct info. I can ping the missing computers from the ones that still see each other and get no response from the missing ones. All packets lost. On the other hand, I can get on one of the missing computers and ping the ones still networked and get 4 for 4 back. I've checked the workgroup names, file sharing, and endless other things. Any ideas of where to look next???