I am using a Wifi Router to share an internet connection with 4 computers and this is working fine. There are 2 workgroups assigned on this network (2 pc's on each workgroup). I was controlling who can access which pc by using the IP address allowed for file sharing via the firewall and all was working fine. On one worgroup though one pc can see the other pc's files but not vica versa. It was all working fine and the firewall and Ip settings on each PC seem to be fine. any help wuld be greatly appreciated.