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Event ID 37: The firmware update capsule (…) code integrity check failed with status

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 firmware update capsule (…) code integrity check failed with status

Event 37
Kernel-Boot
System log
Error
Message and fields (as Event Viewer shows them) 
The firmware update capsule (…) code integrity check failed with status ….

The Windows Update Client Auxillary was successfully updated from version … to version

Event 37
WindowsUpdateClient
System log
Information
Message and fields (as Event Viewer shows them) 
The Windows Update Client Auxillary was successfully updated from version … to version ….

The time provider NtpClient is currently receiving valid time data from

Event 37
Time-Service
System log
Information
Message and fields (as Event Viewer shows them) 
The time provider NtpClient is currently receiving valid time data from ….

Invalid state transition from … in response to

Event 37
TerminalServices-LocalSessionManager
TerminalServices-LocalSessionManager/Operational log
Error
Message and fields (as Event Viewer shows them) 
Invalid state transition from … in response to …. (ErrorCode …)

The cost state has changed.

Event 37
Bits-Client
Bits-Client/Operational log
Warning
Message and fields (as Event Viewer shows them) 
The cost state has changed.  NLM reports the following: 
Cost: …
 Usage: … MB
 Cap: … MB
 Throttled: …
 Overcap: …
 Roaming: …

The resultant BITS Cost state is : ….