Windows Update KB4586781

After installing the following update I was unable to connect to MyCloud.
Restoring the system to the point before installation cleared the problem.
This is repeatable on more than one Windows 10 laptops.

2020-11 Cumulative Update for Windows 10 Version 20H2 for x64-based Systems (KB4586781)

Just update this morning to Windows 10 Version 20H2, no issues with accessing a local network My Cloud or any other NAS on the local network.

The first thing to check any time Windows cannot access a local network NAS like the My Cloud is to see if SMB1.0/CIFS has been disabled. Microsoft likes to disable it on people without telling them. If disabled, enable it.