I have a small network. 2 Windows 10 laptops and an old Windows XP box that is a file server, does the printing and does the backups of the network with a SCSI connected tape drive. Until I moved to a new location this arrangement was working fine. Now, the Windows XP system can see the whole network and can still print and backup, neither of the Windows 10 computers can read the shared drive on the XP system. They can see the computer name on the network but if they try to connect to the shared folder they get:
\\MIESERVER is not accessible. You might not have permission to use this network resource. Contact the administrator of this server to find out if you have access permissions.
A specified logon session does not exist. It may already have been terminated.