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 confirmed that it's aware of an issue where Windows 11 KB5089549 fails to install due to errors such as 0x800f0922.

Microsoft has been trying to optimize Windows as of late, offering performance improvements and introducing suggested feature additions, but things aren't still a work in progress. Case in point, ...

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

Windows security updates from May are failing on some systems. The cause is insufficient space on the EFI partition.