Microsoft confirms Windows 11 update is failing on some PCs, explains if you need a workaround

Microsoft has acknowledged that the Windows 11 update is failing on some PCs due to insufficient EFI System Partition space. They have identified the root cause and are rolling out an optional update (KB5089573) to fix the issue. The update addresses problems with the May 2026 Patch Tuesday update and includes changes like Xbox mode for desktop and explorer.exe fixes. Users experiencing error code "0x800f0922" may have limited space on the ESP partition, necessary for boot files. Microsoft advises installing the optional update to prevent update failures and notes that future updates will also include the fix.