Hi DCB_1, Microsoft removed the homegroup functionality in version 1803 of Windows 10 . . .
If you have a problem seeing other PC's in the Network Section in File Explorer:
Click your Start Button, type Services and hit Enter
When the Services app opens, scroll down to find the following services, then double click each one in turn, set their startup type to Automatic and start the service if necessary
- Function Discovery Provider Host
- Function Discovery Resource Publication
- SSDP Discovery
- UPnP Device Host
Save that and close the Services app
That's It!