I recently installed (3) new Windows 10 workstations at an office that is using Workgroup. The new PC's are Dell Optiplex 3050's and the Network and Sharing Center shows as Private network. All of the other PC's are Windows 7 64bit and their network shows as Work network. The new PC's were only showing the (3) new PC's...until just now. That is weird, as I typed this up, one of the new PC's is now seeing every device on the network.

I am not sure what changed, but I was trying to find a way to match the settings on each one, by making them all Work network.

I will have to keep an eye on this.