https://www.theregister.co.uk/2018/06/08/windows_10_smb1/

The Windows 10 April 2018 Update has been out for over a month now, and the rumbling of user dissatisfaction continues. This time it's networking problems for users still clinging to the venerable SMB1 protocol.

Users have taken to support forums, including Microsoft's own, complaining that the latest version of Windows 10 is taking a hard line against the use of the elderly networking protocol; not just disabling SMB1, but going so far as to block it even when customers attempt to switch it back on.