SMB1 is now disabled on new Windows 10 Installs

Many people here in the past have recommended disabling SMB2 and SMB3 to force Windows back to SMB1 so that Oplocks can be disabled and to prevent TPS corruption.

As of Windows 10 Fall Creator’s Update, new installs of Windows 10 turn off the SMB1 Server (but not client) functionality. Microsoft’s article is here:

Hopefully this heads up will save you some time. It took me hours to figure out why I couldn’t access a W10 share from a W7 machine with SMB1 (because SMB2 was disabled).