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BOOTLOG_NOT_LOADED
Boot log skipped-driver marker for BOOTLOG_NOT_LOADED
BOOTLOG_NOT_LOADED is bug check code 0x000000B6. This value tells you that a driver was considered but did not load in the boot profile. It may be expected in Safe Mode, after hardware removal, or when a service start type and dependency graph exclude it.
How to read it in a dump
- Interpret it with boot mode, start type, hardware presence, and dependency state.
- A not-loaded marker is not automatically an error.
- It becomes important when a required boot or storage driver is skipped unexpectedly.
What to check
- Compare Safe Mode and normal boot logs.
- Check service start type, driver signing, device presence, and dependencies.
- Focus on boot-critical not-loaded entries when diagnosing startup failures.
References
- Installing a boot-start driver
- Microsoft Bug Check Code Reference
- Analyze a kernel-mode dump with WinDbg
Dump evidence
Preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. AllStat summarizes the condition as “Did not load driver”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.
Analysis order
- Run WinDbg
!analyze -v, then inspect the documented meaning of each parameter instead of relying only on the probably-caused-by line. - find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with bootlog / loaded.
- keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.
Do not repeatedly reboot a machine affected by this result before collecting the dump and event logs. Recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.
Looking for a different code? Search another status or error code.