Story perspectives

Microsoft Issues Emergency Fix for Windows 11 Update Failure

5/17/2026

Summary

Story summary

Microsoft released the Windows 11 May 2026 Update (KB5089549) on May 12, 2026, and installation halted at 35-36 % on many PCs.
Errors 0x800f0922 (or 0x80240069/0x80240031) and “Undoing changes” appeared because the EFI System Partition (ESP) had under 10 MB free space, as event logs showed error 0x70.
Microsoft pushed an emergency server-side update that runs a Known Issue Rollback, recommends multiple restarts, and automatically fixes the ESP shortage, eliminating the need for a registry edit.

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Story summary

Microsoft released the Windows 11 May 2026 Update (KB5089549) on May 12, 2026, and installation halted at 35-36 % on many PCs.
Errors 0x800f0922 (or 0x80240069/0x80240031) and “Undoing changes” appeared because the EFI System Partition (ESP) had under 10 MB free space, as event logs showed error 0x70.
Microsoft pushed an emergency server-side update that runs a Known Issue Rollback, recommends multiple restarts, and automatically fixes the ESP shortage, eliminating the need for a registry edit.