Microsoft Fixes Windows 11 KB5089549 Install Failures Caused by Limited EFI Partition Space

Дата публикации: 02-06-2026 13:42:08

Microsoft has fixed the known issue that caused installation failures and 0x800f0922 errors when deploying the May 26, 2026, Windows 11 security update KB508954
Thank you for being a Ghacks reader. The post Microsoft Fixes Windows 11 KB5089549 Install Failures Caused by Limited EFI Partition Space appeared first on gHacks.

Основное содержимое страницы с новостью.

Microsoft has fixed the known issue that caused installation failures and 0x800f0922 errors when deploying the May 26, 2026, Windows 11 security update KB5089549.

The solution is included in the KB5089573 preview cumulative update released on May 26 and will be available to all users through the June Patch Tuesday updates later this month.

The failures were due to insufficient free space on the EFI System Partition (ESP), which led the update to roll back automatically on affected devices.

What Was Causing KB5089549 Install Failures and How to Fix Them

Microsoft confirmed two weeks ago that the problem affected devices with limited free space on the EFI System Partition, especially those with 10MB or less available. On these systems, the installation process would begin normally but fail during the reboot phase at around 35 to 36 percent completion.

Affected users saw a message stating, "Something didn't go as planned. Undoing changes," when the update rolled back. Logs from impacted systems included entries like "SpaceCheck" and "ServicingBootFiles failed," which pointed to insufficient free space on the EFI System Partition.

Microsoft says the issue has been fixed with updates released on May 26, 2026 (KB5089573) and later. Users who install these updates do not need to use any workaround.

To do so, open Settings, then Windows Update, go to Advanced options, and select Optional updates. From there, install KB5089573 or a later update. This will prevent the EFI partition install issue from occurring.

Microsoft recommends installing the latest update because it includes other improvements and fixes. The same resolution will be rolled out automatically to all users through the June Patch Tuesday cumulative update.

Mitigation Options If You Don’t Install the KB5089573 Optional Update

Users who choose not to install the May 2026 optional update can use Known Issue Rollback (KIR), a Windows feature that undoes problematic updates delivered through Windows Update. KIR is automatically applied to consumer and unmanaged devices.

In enterprise environments, administrators can manually address the issue by installing and configuring the Group Policy provided by Microsoft. Instructions for deploying the Known Issue Rollback group policies are available on Microsoft's support website.

The preview cumulative update KB5089573 for Windows 11 versions 24H2 and 25H2 was released on May 26. It includes 30 changes, such as the Low Latency Profile performance feature and various reliability improvements.

This update comes after a series of issues with Windows updates in 2026. Earlier this month, Microsoft confirmed that security updates released in April 2026 caused failures in third-party backup applications that relied on a vulnerable driver.

The company also fixed a Windows Autopatch bug that led to administrator-restricted driver updates being deployed on some devices managed by Autopatch in the European Union.

Схожие новости

#	Наименование новости	Тональность	Информативность	Дата публикации
1	Microsoft Releases Windows 11 KB5101684 Preview Update With 42 Fixes	0	14.44	30-07-2026
2	Microsoft Confirms Windows 11 26H2 as Enablement Package With Support Through October 2028	0	9.11	21-06-2026
3	Microsoft Confirms Windows 11 Memory Optimization for 8GB PCs Among Four New Focus Areas	0	6.45	01-08-2026
4	Microsoft Releases Windows 11 Insider Builds With Unlimited Update Pause Extension and New 26H1 Branch	0	7.86	09-06-2026
5	Windows 11 June 2026 Update Breaks Recycle Bin Dialogs, OneDrive Access, and BSOD Reports Surface	0	9.74	20-06-2026
6	Новая ошибка заставляет Windows 11 занимать более 500 ГБ на диске	0	7	10-07-2026
7	Microsoft Blocks Windows 11 KB5101650 Update on Some Dell Devices Over Shutdown Issue	0	9.61	16-07-2026
8	Windows 11 Version 26H2 Ships as an Enablement Package With No New Features Over 25H2	0	6.88	20-07-2026
9	Microsoft Confirms Windows 11 Bug That Can Consume Over 500GB of Storage Through Permission Log File	-2	6	08-07-2026

Классификация: . Схожих патентов: 0. Схожих новостей: 9. Тональность: 0. Информативность: 13.72. Источник: www.ghacks.net.