Normally, when you have Network Discovery turned on and then click on the Network folder in File Explorer in Windows 10, you will see devices and computers on your network. If at some point you no longer see devices and computers on your network in this folder, here’s something you can try.
Example: You are no longer seeing your external networked hard drive in your Network folder. It will probably show up if you reboot your PC, but here’s something quicker you can try. Pull up Task Manager — ask Cortana for Task Manager or right click on a non-icon part of the taskbar and select Task Manager.
Select the Processes tab and scroll down to find Windows Explorer under Apps or Windows Processes. Right click on it and select Restart. The screen may go black for a moment while the Explorer is restarted and your task icons are restored at the bottom of the screen. Once done, check to see that you can now see networked computers and devices in the Network folder in File Explorer.
If you’d prefer a video, the one below explains how to restart Explorer.exe, which is Windows Explorer — and File Explorer is affected as well.