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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