I have a small network of four computers. Three are running Windows 10 and one is running Windows XP. On two of the Windows 10 computers, no computers are showing up under the Network heading. I've checked that file and printer sharing is turned on, the computers are discoverable, etc. On one of the computers, we have the other network computers pinned to the file manager and they open with no problems, but they are not showing up in File Manager under the Network heading. Any help would be appreciated!