The SMB1 protocol has been deprecated since 2014 and is considered obsolete and insecure.

When did Microsoft disable SMB1?

In Windows 10 Fall Creators Update and Windows Server, version 1709 (RS3) and later versions, the Server Message Block version 1 (SMBv1) network protocol is no longer installed by default. It was superseded by SMBv2 and later protocols starting in 2007. Microsoft publicly deprecated the SMBv1 protocol in 2014.

Is SMB1 still supported?

SMB1 is a deprecated and insecure Windows component still used by many systems and products that was targeted by the infamous "WannaCry" malware back in 2017. ... If SMB1 is disabled in a system, then the connection will get disabled, according to this mitigation scheme.