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Event ID 30908: The SMB 3 and SMB 2 driver is not configured with the default start type

Windows Event ID Lookup: What Windows event IDs mean: 4625, 4624, 4740, 6008, 41, 7045, 1102 and 3,000 more, with Windows' own message text, the fields and what to check.

Look up a Windows event ID from Event Viewer, a SIEM alert or a log export: what it means, the fields it records, and what to check. Many IDs are used by more than one source (event 41 is both a Kernel-Power crash and a boot error), so every definition is shown, the one people usually mean first. The message text is Windows' own, read from the event providers of Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's security auditing reference.

Try: 4625, 4624, 4740, 6008, 41, 1074, 7045, 1102, 4104, 1149

The SMB 3 and SMB 2 driver is not configured with the default start type.

Event 30908
SMBClient
SMBClient/Connectivity log
Warning
Message and fields (as Event Viewer shows them) 
The SMB 3 and SMB 2 driver is not configured with the default start type.

Default Start Type: DEMAND_START
Configured Start Type: DISABLED

Guidance:
You should expect this event when disabling SMB2/SMB3 for the client using SC.EXE or editing the Windows registry. Microsoft does not recommend disabling SMB2/SMB3. Disabling SMB2/SMB3 prevents use of features such as SMB Transparent Failover, SMB Scale Out, SMB Multichannel, SMB Direct (RDMA), SMB Encryption, VSS for SMB file shares, and SMB Directory Leasing. SMB provides alternative troubleshooting workarounds to disabling SMB2/SMB3 in most cases.