New Windows 8 deskside, set up workgroup, worked OK, now not showing other 2 computers on it. What am I doing wrong? Am novice.

Other 2 computers show all 3 computers on Network, and from the other 2 I can access the new 8 box and it's files. Shortly after I had done the set up, the 8 box showed all 3 computers, and from the 8 box I was accessing other computers. Why does the 8 box now only list itself on the Network/Workgroup?

How do access the other 2 computers?