Navbox mapping Win 10

Some Windows 10 versions have a default setting which prevents logon to remote servers. To fix this you have to enable insecure guest logons:

1.     Open the Local Group Policy Editor (gpedit.msc).

2.     In the console tree, select Computer Configuration > Administrative Templates > Network > Lanman Workstation.

3.     For the setting, right-click Enable insecure guest logons and select Edit.

4.     Select Enabled and select OK.

See here:  https://docs.microsoft.com/en-US/troubleshoot/windows-server/networking/guest-access-in-smb2-is-disabled-by-default