Windows 10 Cumulative April 2021 Update causing all client workstation to not able to access the server.

[DocBoyLLC]

Clients running Win 10, Server is running Win 2012. On my client workstations today I installed Win 10 April 2021 update (2021-04 Cumulative Update for Windows 10 Version 2004 for x64-based Systems (KB5001330)). After installing the update, the client workstation can no longer connect to the server. I get the Network Error message "Windows cannot access \\Server; Check the spelling of the name. Otherwise, there might be a problem with the network. To try to identify and resolve the network problems, click Diagnose" (Clients still have internet access, Windows network icon on bottom right of screen shows it is still connected properly to the network).

Error code: 0x80070035
Network path was not found

I tried "troubeshooting." Win 10 claims there is issue with DNS Server.


Under Network Icon --> The client can visibly see other workstations, printers, and the server. Clients can access other workstation clients. When clicking on the server icon, the workstation cannot access the server directory.

I tried various regedits on the client workstations, no avail. Huge problem for me as I'm running a patient database that is stored on the server, and the client workstations constantly access the server and the patient database.

After I uninstalled the April 2021 update, everything is working ok again, and the clients can access server contents again.

Anyone run into this issue? Please help.

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