one lan machine can see a new win 10 workstation, another can't

A network has, inter alia, an old win 10 workstation and a win 7 workstation. They are set up to share files and folders via ethernet (one intermediates backups, the other serves media files, wifi would be too slow for either).

A third workstation running win7 died. It's been replaced with a win 10 workstation ...

- the old win 7 workstation can read & write files & folders on the new win 10 workstation, and vice versa.

- The older win 10 workstation is connected to the same network, can ping the new workstation, but access to files & folders on the new win 10 machine from the old win 10 machine fails with system error 53 in DOS, and with error 0x80070035 in File Explorer.

Please, how to fix this?

Please review this tutorial.

Share Files and Folders Over a Network in Windows 10

I would also ensure that all network connections are listed as Private, not Public.

Start > Setting > Network and Internet > Status

Look at drawing on right, should say Ethernet Private Network.


Ken

Damn right it is cold.

Going to be shorts weather this weekend, nearly 50F.

Weather is really crazy, so cold you can't be outside, two days later it is Spring like.

Glad you got it sorted.