Windows and KB5012170, Microsoft confirms installation issues

Microsoft has confirmed that its Windows update KB5012170 is causing issues when installing. A patch is under consideration but we don’t have a release date.

Released on the occasion of Patch Tuesday of August 2022 KB5012170 is experiencing difficulties. It targets Windows PCs. Microsoft confirms a failure. It occurs during its installation. In some cases the operation results in an error 0x800f0922.

This issue is seen with devices running

  • Windows 11 21H2
  • Windows 10 21H2, 21H1, 20H2
  • Windows 10 Enterprise LTSC 2019, LTSC 2016, 2015 LTSB
  • And Windows 8.1

There is no official fix but a workaround has already been discovered. Unfortunately it is not universal. Clearly it is not necessarily available for all users who are victims of this bug.

Microsoft explains

“When you attempt to install KB5012170, it may fail to install and you may receive error 0x800f0922. Note: This issue only affects Security Update for DBX Secure Boot KB5012170) and does not affect the latest Cumulative Security Updates, Monthly Rollups, or Security-Only Updates released on August 9, 2022 This issue can be mitigated on some devices by updating the UEFI bios to the latest version before attempting to install KB5012170.”

Note that several versions of Windows Server are also affected, including Windows Server 2022, 20H2, 2019 and Windows Server 2012.

A full patch release is planned but we don’t have a timeline. KB5012170 has been available since August 9 as a security update for DBX Secure Boot. It has been offered for all versions of Windows supported by Microsoft.

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