This worked for me today (1Feb2020) and I thank you Brink.

Apparently, Homegroup is now dead in Windows 10. See Are Homegroups dead? Solved - Windows 10 Forums

I used Option 1. Worked just as it should. You've saved me from all the frustration I felt. Ahhhhhh!

Martinr,

Thank you! I used my Microsoft Account login credentials and (POOF!) I was logged into the other computer (a notebook) on my little network.

I saw "This application was unable to start correctly 0x000018." when I tried to run CMD. After reading this thread, I tried to open IE 11. I received the same error message. I then did as Brink...

It should work if you paste the whole line into the File Explorer address line (assuming that your settings show that).

On my machine the whole line resolves to
This PC>HP(C:...