
Microsoft patches Windows 11 update failures by addressing ESP space issue
Microsoft says Windows 11 update failures are caused by insufficient ESP (EFI System Partition) space and has released an optional fix KB5089573 to prevent ESP-space from blocking updates; install it if May 2026 updates failed, or wait for the next Patch Tuesday (June 9) when the fix will be included in future updates. Do not manually resize ESP unless you know what you’re doing, as ESP space can grow from OEM BIOS updates; you can check ESP space with a PowerShell command.





