What’s the target operating system / version ? My recollection is that some versions of Windows had service dependencies such that SMBv2 depended on SMBv1 and we had to remove those dependencies in the services configuration before disabling SMBv1…
Ah, ok, I found them…we actually have out-of-box fixlets for this (that handle the SMB dependencies as well). Check for these Fixlets in the “Patches for Windows” Site:
269654707 2696547: Manage SMBv1 in Windows and Windows Server - Disable Workaround (Remove SMB v1 completely) - Windows 8.1 / Windows 10 / Windows Server 2012 R2 / Windows Server 2016 - KB2696547
269654705 2696547: Manage SMBv1 in Windows and Windows Server - Enable Workaround (Remove SMB v1 completely) - Windows 8.1 / Windows 10 / Windows Server 2012 R2 / Windows Server 2016 - KB2696547
269654703 2696547: Manage SMBv1 in Windows and Windows Server - Disable Workaround (Disable SMB v1) - Windows 7 / Windows 8 / Windows Vista / Windows Server 2008 / Windows Server 2008 R2 / Windows Server 2012 - KB2696547
269654701 2696547: Manage SMBv1 in Windows and Windows Server - Enable Workaround (Disable SMB v1) - Windows 7 / Windows 8 / Windows Vista / Windows Server 2008 / Windows Server 2008 R2 / Windows Server 2012 - KB2696547