Windows update intelligence

KB5089549

May security update · 2026-05-12

Curated snapshot · 2026-10-25. This small collection is not a complete risk assessment. No matching report does not mean an update is safe. Automatic monitoring is not connected.

Update identity

Windows versions: 24H2 / 25H2
OS builds: 26100.8457 / 26200.8457
Release type: Security
Released: 2026-05-12
Last checked: 2026-10-25

Read the Microsoft KB article

Issues & evidence

1 results

KB5089549ResolvedOfficial · C3

May 2026 security update fails to install with 0x800f0922

Some devices failed to install the May 2026 security update due to insufficient free space on the EFI System Partition.

Windows Update / EFI System Partition · Windows 11 24H2 / 25H2 · Architecture unspecified

Resolution links

No resolving links captured in this collection.

An update that supersedes another update does not automatically resolve every associated issue.