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Microsoft Windows Update installation failures on upgraded Windows 11 PCs

Service Disruption
First reported
Last updated
Happening score
H score 1
1 unique sources, 1 articles

Summary

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Microsoft Windows Update is failing on a small percentage of upgraded Windows 11 PCs, blocking June 2026 cumulative updates and producing 0x80073712 or 0x800f0993 errors. The affected cohort includes devices that started on Windows 10 21H2/22H2 or Windows 11 23H2 and were later upgraded to Windows 11 24H2 or 25H2. Microsoft says a fix will reach unmanaged enterprise devices and Home PCs after a restart, while already-affected systems may need package removal or an in-place upgrade. The disruption matters because impacted devices cannot install monthly Windows updates until the issue is cleared.

Related Happenings

Windows 10 KB5094127 extended security update

Security Patch Release
H score10 First: 09.06.2026 21:35 Last: 09.06.2026 21:35 Sources 1

About this happening: Microsoft released **Windows 10 KB5094127** for **Windows 10 Enterprise LTSC** and **ESU-enrolled devices**, delivering the **June 2026 Patch Tuesday** security fixes and extendin...

Open Happening

Windows 11 update installation fix (KB5089573)

Security Patch Release
H score14 First: 01.06.2026 13:59 Last: 01.06.2026 13:59 Sources 1

About this happening: **Microsoft** resolved the **Windows 11 KB5089549** installation failure with **KB5089573**, fixing update rollbacks on devices with limited **EFI System Partition (ESP)** space....

Open Happening

Microsoft Windows Known Issue Rollback guidance for KB5089549

Advisory/Mitigation
H score14 First: 01.06.2026 13:59 Last: 01.06.2026 13:59 Sources 1

About this happening: Microsoft's **Known Issue Rollback** guidance gives **Windows 11** users and admins a workaround for **KB5089549** installation failures caused by low **EFI System Partition (ESP)...

Open Happening

Microsoft Windows Update restricted-network download failure

Service Disruption
H score13 First: 19.05.2026 14:22 Last: 19.05.2026 14:22 Sources 1

About this happening: Microsoft's **Windows Update** is failing in **restricted network environments** after the **January 2026 optional non-security preview updates**, leaving affected systems unable...

Open Happening

Microsoft Windows 11 KB5089549 cumulative update

Security Patch Release
H score19 First: 18.05.2026 11:33 Last: 18.05.2026 11:33 Sources 1

About this happening: Microsoft's **KB5089549** **Windows 11** security update is failing to install on some systems, forcing affected devices to roll back during reboot. The problem is tied to a nearl...

Open Happening

Timeline

  1. 10.06.2026 14:33 2 articles · 1h ago

    Initial report: Microsoft Windows Update installation failures on upgraded Windows 11 PCs

    Initial Disclosure

    Microsoft identified a Windows Update installation failure affecting a subset of devices upgraded to Windows 11 24H2 or 25H2. The issue blocks June 2026 cumulative updates and generates 0x80073712 or 0x800f0993 errors.

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