Really strange, out of the box, Resources showed my Windows 10 machine fine and the Samsung display worked fine. Then, after 2 weeks, it stopped and never worked again. Auto-update is on, so I suspect Samsung deliberately downloads some update that disables the display somehow. I have seen this happen to many people, works fine for 1-2 weeks, then never connects again.
I had the Samsung local repair center visit, twice, they changed the motherboard, still couldn't get it to work. Side by side with LG which has no problem to recognize/connect the Windows 10 machine.
I've updated the firmware and note, once you update, there is no roll-back. I've already checked Windows Firewall, did a factory reset, checked display drivers, sharing is also fine. Again, my LG43UK6300 works perfectly.