Why are network drives disabled on Windows 10 1903?

Question

Windows

Good afternoon.

On one computer in the domain, network drives are disconnected at exactly the same time.
Lost access with an error about the inaccessibility of the network drive.
There is nothing in autoload, no extra (non-system) batch files or any scripts were found on the computer, updates were installed on office applications, there were no system updates.

Where to dig, what could be wrong in the system that it disables network balls?

Answer 1

Search logs (system events) on the client itself and on the server. Once the time is known, it will be easier to search.
Most likely it is at this moment that something happens to the network. This may be the appearance of a duplicate IP on the network, the restriction of traffic by a firewall, a change in the ip address v4 or v6. In general, anything.
Try to share the folder on the same computer and connect to the same computer. See if it falls off.