Microsoft has resolved a known issue causing installation failures and 0x800f0922 errors when deploying the May 2026 Windows 11 security update (KB5089549). As Microsoft explained when it acknowledged ...

Microsoft confirmed that KB5089549 can fail with error 0x800f0922 on Windows 11 devices with low EFI partition space, and shared workarounds are available.

Microsoft has confirmed that the May 2026 Windows 11 security update (KB5089549) fails to install on some systems and triggers 0x800f0922 errors. This known issue is caused by insufficient free space ...

Windows 11 May 2026 update fails on some PCs, but Microsoft has already shipped a workaround, and it's working on a permanent fix.

Microsoft has resolved Windows 11 KB5089549 install failures tied to low EFI partition space through KB5089573, which also brings a ton of other improvements.

Windows 11 users are warned that backups are broken across multiple third-party applications after another Microsoft security update brings unexpected consequences.

Microsoft has fixed the Windows 11 KB5089549 install error 0x800f0922 through KB5089573 for 24H2 and 25H2 PCs.