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ERROR_NOT_SAFE_MODE_DRIVER
Safe Mode excluded this driver from the reduced boot configuration
Safe Mode intentionally starts Windows with a limited set of drivers and services. This status means the driver was skipped because it is not part of the Safe Mode load set; it does not by itself prove that the driver binary is corrupt or incorrectly signed.
Use the current boot mode as the first discriminator. If the same driver loads normally outside Safe Mode, repeated reinstall attempts do not address this status. For a device or service that genuinely must function in Safe Mode, review the supported driver and service configuration rather than forcing a one-off image load. If the error appears during normal boot, verify that the system is not using a Safe Boot configuration and then investigate the different driver-load failure that follows. Code Integrity logs are relevant only when signature enforcement also reports a rejection.
What to inspect
- Confirm whether Windows was booted with a Safe Boot option.
- Compare the driver service configuration with the intended Safe Mode support model.
- Check Code Integrity separately instead of assuming this code is a signing failure.
References
- Microsoft: introduction to Plug and Play
- Microsoft: kernel-mode driver signing policy
- Microsoft: Code Integrity diagnostic events
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