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Event ID 207: Measured Boot library was initialized

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

Measured Boot library was initialized.

Event 207
Kernel-Boot
System log
Information
Message and fields (as Event Viewer shows them) 
Measured Boot library was initialized. Phase: …, StatusCode: ….

Dispatching a write request.

Event 207
StorPort
System log
Information
Message and fields (as Event Viewer shows them) 
Dispatching a write request.

The KDC used a hash algorithm for the PKINIT protocol that is not supported on the client

Event 207
Security-Kerberos
System log
Error
Message and fields (as Event Viewer shows them) 
The KDC used a hash algorithm for the PKINIT protocol that is not supported on the client: ….

The URL "…" in BITS job "…" does not support the HTTP Content-Length header, which is required for BITS bandwidth throttling.

Event 207
Bits-Client
Bits-Client/Operational log
Warning
Message and fields (as Event Viewer shows them) 
The URL "…" in BITS job "…" does not support the HTTP Content-Length header, which is required for BITS bandwidth throttling. The URL will be downloaded without throttling.