Solution Summary:
1) Problem - After upgrading Windows 10 on both PC and Laptop to April 30, 2018 Creator update, lose networked computers and homegroup
1) April 30, 2018 Creator update drops the homegroup from Windows 10
2) Solution
1) On both PC and laptop
1) Run services.msc
2) Function Discovery Resource Publication - make sure that it is set to automatic (delayed start), stop and then start services
3) Reboot PC and laptop
2) On both PC and laptop now see the following:
1) Network lists both computers on both computers
2) Networked computers lists:
1) Network\DESKTOP_Other_Computer\Users\Default
2) root of Steve C:\Users\Steve under both Networked computers
3) printer connected to PC under PC
3) Mapped network drives can connect
4) Documents, Downloads, Music, Pictures, and Videos of C:\Users\Steve BUT CANNOT see any files or other folders like vimfiles and _vimrc
3) On both PC and laptop:
1) Steve -> Properties -> Security -> Check - List content, Read (started conservative with list and read but can check all to skip 7 below)
2) Give access to specific People should see
1) Steve
2) HomeUsers - Custom, with Read and Read/Write options available
3) In Specific People drop-down menu, should see as for above
7) On both PC and laptop
1) Give access to -> Specific People -> HomeUsers - Read/Write -> Share (Seems to be the 1803 default method, see: https://support.microsoft.com/en-us/help/4092694/windows-10-changes-to-file-sharing-over-a-network)
8) On both PC and laptop now back to pre-1803 state
Hopefully, this information will help others to fix their network and mapped network drives to the pre-1803 state.
Good luck!