Network & OneDrive block

I have a problem with networking my Desktop PC (Windows 11 Home v.10.0.26200) and my Laptop (Windows 11 Professional , also v10.0.26200).

They are connected by a 2m ethernet cable and have connection lights flashing at both ends.

1.    On the Desktop, Explorer will show folders from the Laptop under <Network>. However any attempt to open one of the displayed folders results in the message “Windows Cannot access \\*. You do not have permission to access \\*. Contact your network administrator to request Access”

While drives and folders on the Laptop that HAVE been set to Share do NOT show up

2.   On the Laptop, when I open the <Network> in Explorer it ONLY shows a drive named <Music>.  Any attempt to open this folder results in a Windows Security window asking for Username and Password.

I believe this folder is a left over from a much earlier attempt to link the two computers in Windows 10 which was aborted, and I suspect it is causing a ‘block’ on the network, as there are no drives or folders named <Music> on my Desktop machine.

3.    I have run OneDrive on the Laptop and have created an account in the cloud and added folders. However it has proved impossible to get OneDrive to run on the Desktop. Every attempt (including uninstalling One Drive using Revo uninstaller – which also removes all ‘left-overs’ - and then installing the latest downloaded copy of OneDrive) produces an icon in the apps list, but when I attempt to run it (double click) nothing happens. I have traced the .exe file to "C:\Program Files\Microsoft OneDrive\OneDrive.exe" but attempting to run it from there, even as an Administrator, fails to produce any reaction from the PC.

My problem obviously resides with the Desktop PC and is effecting both the ability to network, and run OneDrive. I suspect the non-existent <Music> may be the culprit, but how to remove it? If I right click the icon on the Laptop I get a window showing the location as being on the \\ Desktop and size as being 0 bytes – but nothing more. Selecting the <Network> tab in the window produces an error message “You do not have the appropriate access rights for this server. For more information, contact your network administrator” Attempts to delete the phantom drive, even using Revo Uninstaller have proved unsuccessful while attempting to run <Remote Desktop Connection> from the Laptop have proved to be equally futile (“Remote Desktop can’t connect to the remote computer for one of these reasons. 1,2,3 etc.).

How can I get rid of the phantom <Music> drive? and if this has nothing to do with my problem, what else might be the cause that prevents OneDrive from running on the Desktop and the failure to network with the Laptop?