The above experience is also confirmed by a reader in this comment. Then I tried to install update KB5022899 (Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) afterwards, but got error 0x800F0922 reported already during installation.Īt this point, the cause was clear to me: Windows 8.1 has fallen out of support in January 2023 and the update installation is therefore not possible. I downloaded this SSU from the Microsoft Update Catalog and was able to install it. However, this problem could be solved, because when I evaluated the CBS.log file in the Windows Logs folder, I found the note that the Servicing Stack Update (SSU) KB5018922 from Octois missing. I received similar feedback from the readership, see this German comment.

However, I was unsuccessful at first, the update installer of Windows 8.1 told me after a while that the update was not suitable for my machine. So I tried on a test basis whether the rollups are installable for Embedded or for Windows Server 2012 R2. this entry in the Microsoft Update Catalog). But there is still a Windows 8.1 system and Microsoft has released the updates also for Windows 8.1 Embedded (see e.g. Here I do not have Windows Server 2012 R2 for testing. I had reported the details in the blog post Patchday: Windows 11/Server 2022 Updates (February 14, 2023). Microsoft released security update KB5022899 (Monthly Rollup for Windows 8.1 and Windows Server 2012 R2) and update KB5022894 (Security Only Quality Update for Windows 8.1 and Windows Server 2012 R2) on Feb.

0x800f0922