![]() ![]() ![]() Microsoft confirms that the KB5012170 update adds modules to DBX. ![]() The Secure Boot Forbidden Signature Database (DBX) database "prevents UEFI modules from loading". Secure Boot is a security feature that protects the boot process of the system. Windows devices with UEFI based firmware support Secure Boot. This security update makes improvements to Secure Boot DBX for the supported Windows versions listed in the "Applies to" section. The update improves Secure Boot DBX in Windows: The update has been released for several supported client and server versions of the Windows operating system, including Windows 8.1, Windows 10 and Windows 11. Secure Boot DBX updateĪ support page for the Secure Boot DBX update has additional information. The company is investigating the issue currently and plans to "provide an update in an upcoming release". Whether that is possible depends on the installed version of the UEFI bios, and whether an update is available. ![]() Microsoft suggests that administrators may be able to resolve the issue by updating the UEFI bios of the system to the latest version before installing KB5012170. The issue is unrelated to the installation of the cumulative updates for Windows, which Microsoft released on the same day. When attempting to install KB5012170, it might fail to install, and you might receive an error 0x800f0922. Microsoft describes the issue on the known issues and notifications support page for supported operating systems, e.g., for Windows 11 and Windows 10. Installation of the second update may throw the error 0x800f0922 and the update fails to install as a consequence. ![]()
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