I have three computers on my home Ethernet (i.e.. Cat5e wired) as follows:
DELLDESK Windows 10 Pro, 21H2
OPTIPLEX Windows 10 Pro, 22H2
LAPTOP2 Windows 11 Pro, 22H2
On the desktop of each computer, I have shortcuts so that I can access the Shared folders on the other machines. For instance, on OPTIPLEX, I have two shortcuts pointing to \\DELLDESK and \\LAPTOP2. All of these shortcuts were working correctly.
As an experiment, I disabled “SMB 1.0/CIFS File Sharing Support” from Windows Features (I’d heard that SMB 1.0 is unsafe) on all machines. Afterwards, one of the desktop shortcuts no longer worked (all others were still working). Specifically, the OPTIPLEX desktop shortcut pointing to LAPTOP2 fails with the following error:
Network Error
Windows cannot access \\LAPTOP2
You do not have permission to access \\LAPTOP2. Contact your network administrator to request access.
Error code: Error code: 0x80070035
The network path was not found.
I have now re-enabled SMB 1.0 on all machines, and rebooted, but the situation remains: all shortcuts work except the one from OPTIPLEX pointing to LAPTOP2. Clearly, disabling SMB 1.0 has had a very specific side-effect that has not been reversed by re-enabling SMB 1.0. What could that possible be?